The best video on describing the Mass Air Flow Sensor. I have spent $2,200 on repairs of all sorts and still the car stalls, now a new mechanic wants another $400 to replace Mass Air Flow Sensor. I may be a senior lady of 70, but I did massive research on all the causes of stalling. Even brought the foundings to the mechanics who apparently ignore the air vacumn hose, electrical problem maybe and just replace parts. I filed a claim with BAR and got $1,420 back on those not necessary parts installed by two mechanics, for the car still stalls at stop lights. A 14 year Nissan Altima that is worth about $2,400 Kelly Blue Book estimate, which I bought new, seems silly to keep throwing money into it. I have not driven on a freeway since September 2, when the stalling began. As I can handle the local streets if it stalls, for it starts right away, but on a congested stop and go freeway, do not wish to take the chance. The interior is spotless and still looks great with no dents, except a scratch here and there. I think if I can clip my fingernails I can test this myself, as I change my tires, check my oil levels, water levels and change my air filters. Again, thank you for such a easy to comprehend description of the testing and replacing of an Mass Air Flow Sensor.
Well it may be silly to throw money into it, but its to keep it running, Just know your problems it is causing and do research, And let me tell you, you get rid of the car u have and get a new one and think its okay to drop $5k the instant u sign the paper and $10k loss the first year? but its not ok to drop money on a car that needs $300-500 of work that'll last u another good amount of years? yeah just seems silly to me..
Thank you, Pokemonguy16RS. I appreciate your feedback indeed. I am a woman of 71 on mostly SS benefits and as sometimes professional singing gig, I cannot buy a new car and if I go for a used car, it would have to be not older than a 2010...and those are not inexpensive either. I have researched beyond believe and know more about cars than 3 men that I know, I also know more about fixing computer problems more than those 3..ha,ha. I have researched and printed out all the possible causes for the car to stall as it has since Sept. 2 of this year. I have also research what a mass air flow sensor does and the different prices they ask for one online. Nissan wants $600 plus tax for that little box???? I cannot take a bus to carry my singing sound equipment or a taxi ( a taxi would charge me for loading the equipment in their vehicle), so not too much remedy and I do not also have friends to do the driving favors. That's what happens when you are independent all of your life. I did get 70% of my money back from the first mechanic, when I filed a claim with the Bureau of Automotive Repairs of California, so that is a somewhat victory, yet the problem still happens. Thank you so much.
You literally just saved me by having this video. I had just got my 96 maxima back from a repair on some hoses connecting to my clutch, and suddenly when I got my car back it was in limp mode, it would not accelerate beyond 2500 rpms. After watching this, I went back to my car, and checked the connection. It was completely loose! So I plugged it back in and it connected firmly, now my car is running like its old good self! Thanks!
Thank you! Thank you! Thank you! Your videos are clear--the visual, audio, and explanation. Thank you for not skipping vital parts of the procedure. We are relative newbies and having these kinds of instructions is important. My Nephew was ready to let his 1996 Infinity I30t sit in a semi-functioning state after having several failed-repairs at a local repair shop. The MAF sensor was replaced by the shop with a used one, only to have the same hesitation symptoms return two weeks later. After watching your video, we did the tests you prescribed, including checking and cleaning the two ground points, which were covered with a pile of greasy dirt, which looked like grease-covered sawdust. The voltage tests turned out good. After shooting the Film with the MAF cleaner (6 or 7, three-second bursts), I accidentally rubbed the Film with my nitrile gloves, only to find that the apparently black-colored Film (much like a fine screen on a flour sifter) was actually, a silver/aluminum color (much like the flour sifter), so I used the gloves like erasers to rub off the dirt. If I had had a pencil with eraser at one end, I would have used it to clean the inside of the Film. I finished by shooting cleaner through both sides including the two small sensors, around three more times each. I also used the electric/electronics cleaner on the power/sensor leads that we tested. Now, besides the lack of hesitation and idle problems when warm, my nephew reports that the radio also seems to be functioning much better. Is the improved radio function related to cleaning the grounds? Is the Film a "Hot-Film"? Whole operation took about 50min in the sun with temps in the upper 90's. If we did this again, It would probably be a 25min job. Tools: two small pry-bars (8in&11in), tapered/needle nose pliers, 10mm deep-well with 3/8in drive and roughly 6in extension, and 10mm shallow socket with 1/4in drive and 4in extension, slotted screw-driver, t-pin (out of paper-clips at Wally world), MAF cleaner as shown in video, electrical/electronics cleaner of the same brand, cheapo multi-tester/meter, and nitrile gloves. I got the two pry-bars, gloves and t-pin from Wally world and the cleaners from Advanced Auto Parts. Had the other tools. We will be using more your videos. The spark-plugs are next,.
Very helpful vid. My 95 Maxima was bucking and cutting out at low speeds. Showed Diagnostic Trouble Code (DTC) 12 on the Malfunction Indicator Light (MIL), which equates to P0100 using the Consult tool that I don't have. Fortunately, between this vid and the factory service manual that I bought when the car was new, it was easy to diagnose. Wiring and harness readings from this vid were good, so I replaced the mass air flow sensor with a Cardone reman and erased the DTC memory and MIL. The MAFS was not cheap (about $200), but that's the way it goes. Car runs fine now. So far, so good, so thanks again for this great video.
just bought a 1998 Infiniti I30 and my whole SAE [PP] >PP< tube was at the bottom of the engine bay, now i'm worried about what else isn't connected lmao wish me luck this is my first car and never learned anything about cars so i'm teaching myself 😎
This is good info to have, but didn’t cover my problem. The green clip won’t always or usually snap when I put the sensor in. The connection is rather loose. Not sure how to fix this or even what part to shop for.
Gotcha. You can actually replace the harness connector. Typically you'll have to purchase an entire kit full of adapters. Try ebay first. You may be able to find one.
Okay I replaced the mass air flow sensor but when I drove it it was coughing puking and when then it died but when I restarted it and move some wires around it stayed running normal could it be the connector or the wires and where does the black read and white wire go
Do you still have your 97 Maxima? because I've enjoyed your DIY informative videos. I am having a problem with my 97 Maxima-- since replacing the MAF sensor connector __ the car dies when connect the MAF, but runs when disconnected. What do you think is happening?
Awesome video, I recently cleaned my maf sensor and i notice the increase of power. Quick question, after cleaning the sensor, I feel that my speedometer doesn't match my actual speed. It displays a lower speed. Any suggestions? Thanks
My buddy has a F 350 that randomly, when he hits the gas, wont respond and stays at idle. He has this happen where he gets no response from gas pedal but it just idles. Then he restarts the car a few times and it will go away. Does this sound like the mass air flow sensor could be the culprit? Also I was thinking the newer drive-by wire pedal might have a malfunction in reading the senor position. But I've also heard someone who had a bad alternator that put out too low voltage and ended up causing a faulty mass air flow sensor so they both needed replacing. Any ideas? So far the cpu is throwing no codes... Thanks for the videos, they're so awesome.
John Smith Hey John. It sure could be the MAF sensor. You may want to check if the vehicle has any trouble codes but a faulty MAF sensor could inhibit the vehicle from accelerating. (On my Maxima, the limit is 2400 RPMs) Also check for vacuum leaks.
hello, I have a 97 Altima, and it idles rough then it turns off, but if I disconnect the MAF sensor it runs fine and does not turn off at idle. I did your test, it passed the first one, then I did the second part of the test by connecting the paper clip into the plug of the MAF as the car was running and it gave me a reading with higher voltage than norm. (about 15.3v) Yes it has check engine light on. Not sure of the code. I believe it was PO340 something with the distributor which I already replaced. Any idea? Also I bought one new MAF and a used one and both gave me same reading.
jomar rodriguez Okay. When you tested the MAFS with the paper clip, which terminal are you testing? If you disconnect the harness connector facing up (the little notch that you press down to remove the sensor is facing up) you want to test terminal 1 which is the terminal all the way to the right. (Should be all the way to the left when connected.)
jomar rodriguez 15v is way off the charts. The voltage for your car at idle is between 1-2 volts. A high voltage will cause your engine light to illuminate for code p0100. Other symptoms of a bad MAF sensor is hard starting/restarting and detonation. On some vehicles you can't go above 2500 rpms because the vehicle enters a fail safe mode. If you performed the test correctly sounds to me the sensor is no longer working. I'd check first though what engine codes the car has.
I'm not understanding something. You're saying that if all of these readings are good and within the right range, my only choice is to replace the MAF sensor? I would think that, if it passes all of these tests, that means I can consider my MAF sensor to be in good shape, and that I need to look for the problem elsewhere
I have a 2000 Infiniti i30 that constantly dies after getting a jump or even having the battery fully charged. I thought it would be the alternator or belt but I have replaced it with new ones and it still does the same thing. The dashboard lights flickering until it completely cuts off.. what is the problem?
thanks bud, It really helped, I did the test on my 95 Nissan 240sx and the readings like you did and numbers came out about the same, question though when I did the check between terminal 3 and ground I got back 13 Volts isn't that a bit high?
hello i have a 2004 nissan 350z and i am getting a code P0103 it is saying it is a MAF problem and i was wondering if you have any suggestions because the nissan dealership wants to charge 1500 to also replace the cam and crank sensors
I have a 1996 Nissan Pathfinder which recently would start jolting and bucking while driving and when slowing down or coming to a stop would stall. This was periodic but now it'll crank but won't start. I did the test between the third terminal and the ground and was reading between 1-2 volts. So, I figure the connecter is bad just not sure what steps to take from here.
Same problem on my 97 Nissan 4x4, 4 cylinder. Codes are P0100 & P0135. Although the last time I cleared the codes there was only P0136. Does a problem with the MAF trigger false O2 sensor codes? This youtube link no longer works. Can you re-direct me? Thanks!
Hello, I have 1997 Nissan maxima, and when try to start to my car it would die immediately. This usually happens after a day or two of not driving it. In order to start the car successfully, I would have to step on the gap pedal as I start it. This has been happening for almost 2 years and my check engine light has not lighten up ever. Within the last month, sometime when I start the car, the rpm will jump between 500-1500 rpm back and forth for like a minute. I don't know if this is related, but would you think this is mass air flow sensor causing my car to not start normally
Ethan Lau If the MAF sensor is bad, you'll be unable to get the car above 2400 RPMs. (The car would run in fail safe mode.) It sounds to me you have a different issue. Have you checked the spark plugs? Also check the PCV valve. I have a video for both of these issues and both are performed on a '97 Maxima. The other thing to check is if the car is running on all six cylinders. You can do this by disconnecting the coil pack for each cylinder (one at a time as the car is running) and see if there's any change. If there isn't then you know that cylinder isn't firing. If you're not sure what a coil pack is just watch my Maxima spark plug replacement video.
I have a 97 Nissan Maxima and when I get it up over 2rpms it just jumps and sputters. Then when I take my foot off the gas it shuts off. I did replace the Air filter and cleaned the MAF sensor. Worked for 2 days then it went right back acting crazy in the same manner. While I was at the parts store I had them run the tester on it and it came up with these 4 codes P1447, P0100, P0130 and P0325. All these I believe deal with Air flow. I did (before I found your video) go ahead and replace my MAF sensor. So now of course this did not work either. So now I have to do the other steps that you talk about in your video. But I have a question and this may be dumb but here goes, Does the electric that goes to the MAF sensor have a fuse that could be busted? Just thought !!!!!!!
Cheryl Williams Sounds like classic MAF sensor issues. If there's a problem with the MAF sensor, the computer cuts fuel at 2400 RPMs. Out of all these codes I'd be most concerned with p0100 - MAF sensor. Run the tests I show in the video and let me know if you need additional help. (The sensor doesn't have a fuse. It runs off a large relay)
CarsNToys Ok I will it is raining here today so as soon as I can I will do the other tests. I have already replaced the MAF sensor, but do I have to disconnect the battery after and let it reset the system?
STOP. STOP. STOP!!!!!!!!!'!!!!!! DO NOT REPLACE ANYTHING!!!!!!!!!!!! I am a Nissan service technician and can help with these problems. When you have random multiple codes and poor running, the problem is most likely a broken wiring harness at the right strut tower. The engine mounts in these cars are allowed to get soft, then the engine rocks back and forth too much. There is a technicial service bulletin about this. Basically the main engine harness needs to be opened up behind the right strut tower and the harness repaired. Then replace the engine mounts to eleminate the excessive engine movement.
hi i got a 98 infiniti i30 with the same engine as the maxima from 95 to 02 and i chaince the maf sensor but the car wont runing right and when press the gas the car move slow and i chance the cam sensor y fix the timing problem and the fuel pump and the car last time i chance the battery and work find and this time its got the maf sensor problem
CarsNToys some times it will blow cold and most of the time it is hot. We have replaced the relay switch. And also the valce on top of the compressor. Before we replaced the relay the compressor did cycle off and on but now that issue is fixed. Now its the mystery of why it isn't cooling. We put freon in it. And checked it and it still says full.
Hi I have a 1999 Nissan Altima that has idling problems. It turns when I stop at a red light. it could be the idling air valve control or the mass air flow sensor. I took it to my mechanic and he gave a little overpriced amount for the repair. I don't know if you can help me I just want to figure out if I could just clean the sensors myself rather than buying them new.
CarsNToys Yes, it turned on recently. Apparently the knock sensor is bad too but I don't think that could be the problem. I believe the main problems may come from either the idling air valve control or mass air flow sensor. I will check the hoses for vacuum leaks anyway.
Skits Visit your local auto part store. They most likely sell a pack of connectors that will match up to the one you need. Just solder on the new connector. (Take a look at my aftermarket radio video. In that video I show what I mean by soldering wires and using heat shrink tubing.)
i got the P0101 code MAF sensor is in good condition. so what else could be the problem
Před 7 lety+1
I have the same code with my altima 2011, already cleaned the air filter and MAF sensor. Next thing i will d o, but i don't know when, i will clean the throttle body. It may be dirty and wont allow enough air to get in i guess. If you get any solution please tell me!
Humberto García I had the same issue, my sensor was good so I had a mechanic clean the throttle body and didn’t have an issue for another 30-50,000 miles. But now with 155k miles my car will crank but just won’t turn over. Can’t start it so I haven’t had the chance to take it to my mechanic.
+Wimbo Mahadi in California near San Pedro there is a junk yard for nissan parts only, there are plenty of these nissan or specific car type junk yards or you can go to 'pick a part' all in LA COUNTY. I paid $75 used part $7 tax, you might be able to order it from them and have them mail it to you.
+Wimbo Mahadi they included the seals and silver circular closure also. it was the cheapest of the 4 locations we could find others started for used part $125 and the dealer was ridiculously expensive
I don't know if it's My MAF sensor or what. .when I drive it cuts out . (once while driving the car died but started right back )check engine light is on. Does anyone know what the problem is ..it's 96 Nissan maxima..thanks
Hello friend, i have a question where did you buy those diagrams with the specifications how to test components like MAF Sensor, I see that even the pin on the connector is numbered for that specific car, I just bought one at AutoZone store it's called Haynes it's not complete just general information also different types of engine not good for me, I need a book with more in depth information, can you provide me a link where to buy it, thanks in advance, by the way I liked your video how to test a maf sensor my has 5 pins but i do not know which pin it's ground, signal or positive. Give some info about the book if you can please thanks again. My is a 2001 hyundai santa fe GL 2.4 Engine manual transmission. My car clicks when I turn the ignition switch then I tried again and wants to crank but it does not crank, then I tried one more time and it moves the engine slow or the engine rotates slow, any ideas what could be my problem I does not start at all.
CarsNToys 94 camaro z28 3 pin cable maf sensor .i checked the power and ground indicating around 12 v but sıgnal wire over 4 volt at idle when i press the gas pedal it goes down like 4.5 4.4 4.3 about around 2000 rpm im suspicious of opti as well
CarsNToys did not scan it . i was just checking the sensors before opti .i tested map sensor on it as well :) im getting rare voltage reading on maf .and vacuum lines seems to be okay
Gotcha. Some vehicles go in fail safe mode when there's a problem with the MAF sensor. For example, the car won't rev above 2500 RPMs. You can also buy a cleaner for the MAF sensor.
This is good info to have, but didn’t cover my problem. The green clip won’t always or usually snap when I put the sensor in. The connection is rather loose. Not sure how to fix this or even what part to shop for.
Okay I replaced the mass air flow sensor but when I drove it it was coughing puking and when then it died but when I restarted it and move some wires around it stayed running normal could it be the connector or the wires and where does the black read and white wire go
The best video on describing the Mass Air Flow Sensor. I have spent $2,200 on repairs of all sorts and still the car stalls, now a new mechanic wants another $400 to replace Mass Air Flow Sensor. I may be a senior lady of 70, but I did massive research on all the causes of stalling. Even brought the foundings to the mechanics who apparently ignore the air vacumn hose, electrical problem maybe and just replace parts. I filed a claim with BAR and got $1,420 back on those not necessary parts installed by two mechanics, for the car still stalls at stop lights. A 14 year Nissan Altima that is worth about $2,400 Kelly Blue Book estimate, which I bought new, seems silly to keep throwing money into it. I have not driven on a freeway since September 2, when the stalling began. As I can handle the local streets if it stalls, for it starts right away, but on a congested stop and go freeway, do not wish to take the chance. The interior is spotless and still looks great with no dents, except a scratch here and there. I think if I can clip my fingernails I can test this myself, as I change my tires, check my oil levels, water levels and change my air filters. Again, thank you for such a easy to comprehend description of the testing and replacing of an Mass Air Flow Sensor.
eveyholmes Glad to help!
Well it may be silly to throw money into it, but its to keep it running, Just know your problems it is causing and do research, And let me tell you, you get rid of the car u have and get a new one and think its okay to drop $5k the instant u sign the paper and $10k loss the first year? but its not ok to drop money on a car that needs $300-500 of work that'll last u another good amount of years? yeah just seems silly to me..
Thank you, Pokemonguy16RS. I appreciate your feedback indeed. I am a woman of 71 on mostly SS benefits and as sometimes professional singing gig, I cannot buy a new car and if I go for a used car, it would have to be not older than a 2010...and those are not inexpensive either. I have researched beyond believe and know more about cars than 3 men that I know, I also know more about fixing computer problems more than those 3..ha,ha. I have researched and printed out all the possible causes for the car to stall as it has since Sept. 2 of this year. I have also research what a mass air flow sensor does and the different prices they ask for one online. Nissan wants $600 plus tax for that little box???? I cannot take a bus to carry my singing sound equipment or a taxi ( a taxi would charge me for loading the equipment in their vehicle), so not too much remedy and I do not also have friends to do the driving favors. That's what happens when you are independent all of your life. I did get 70% of my money back from the first mechanic, when I filed a claim with the Bureau of Automotive Repairs of California, so that is a somewhat victory, yet the problem still happens. Thank you so much.
Bless you mad'am, you are an inspiration to some :)
New motor $3000 new Altima $23000
No brainer. Always worth replacing versus rebuying. Call a mobile guy most of them are pretty straight shooters.
You literally just saved me by having this video. I had just got my 96 maxima back from a repair on some hoses connecting to my clutch, and suddenly when I got my car back it was in limp mode, it would not accelerate beyond 2500 rpms. After watching this, I went back to my car, and checked the connection. It was completely loose! So I plugged it back in and it connected firmly, now my car is running like its old good self! Thanks!
+Snake DeShazer Gaming Good stuff man.
.
Thank you! Thank you! Thank you! Your videos are clear--the visual, audio, and explanation. Thank you for not skipping vital parts of the procedure. We are relative newbies and having these kinds of instructions is important. My Nephew was ready to let his 1996 Infinity I30t sit in a semi-functioning state after having several failed-repairs at a local repair shop. The MAF sensor was replaced by the shop with a used one, only to have the same hesitation symptoms return two weeks later. After watching your video, we did the tests you prescribed, including checking and cleaning the two ground points, which were covered with a pile of greasy dirt, which looked like grease-covered sawdust. The voltage tests turned out good. After shooting the Film with the MAF cleaner (6 or 7, three-second bursts), I accidentally rubbed the Film with my nitrile gloves, only to find that the apparently black-colored Film (much like a fine screen on a flour sifter) was actually, a silver/aluminum color (much like the flour sifter), so I used the gloves like erasers to rub off the dirt. If I had had a pencil with eraser at one end, I would have used it to clean the inside of the Film. I finished by shooting cleaner through both sides including the two small sensors, around three more times each. I also used the electric/electronics cleaner on the power/sensor leads that we tested. Now, besides the lack of hesitation and idle problems when warm, my nephew reports that the radio also seems to be functioning much better. Is the improved radio function related to cleaning the grounds? Is the Film a "Hot-Film"? Whole operation took about 50min in the sun with temps in the upper 90's. If we did this again, It would probably be a 25min job. Tools: two small pry-bars (8in&11in), tapered/needle nose pliers, 10mm deep-well with 3/8in drive and roughly 6in extension, and 10mm shallow socket with 1/4in drive and 4in extension, slotted screw-driver, t-pin (out of paper-clips at Wally world), MAF cleaner as shown in video, electrical/electronics cleaner of the same brand, cheapo multi-tester/meter, and nitrile gloves. I got the two pry-bars, gloves and t-pin from Wally world and the cleaners from Advanced Auto Parts. Had the other tools.
We will be using more your videos. The spark-plugs are next,.
Excellent! Most people just throw parts at stuff for a "fix" diagnostics to the root cause is key!
Very helpful vid. My 95 Maxima was bucking and cutting out at low speeds. Showed Diagnostic Trouble Code (DTC) 12 on the Malfunction Indicator Light (MIL), which equates to P0100 using the Consult tool that I don't have. Fortunately, between this vid and the factory service manual that I bought when the car was new, it was easy to diagnose. Wiring and harness readings from this vid were good, so I replaced the mass air flow sensor with a Cardone reman and erased the DTC memory and MIL. The MAFS was not cheap (about $200), but that's the way it goes. Car runs fine now. So far, so good, so thanks again for this great video.
Charlie Hood That's great, Charlie. Glad to help out! Cheers.
Hi Omer. I'll try to shoot a video this weekend showing front bumper replacement. Otherwise, I'll upload diagrams how to complete the job.
This blog really helped me to clean my Maf sensor... Thank you.
Very well presented sir. Bravo. Excellent presentation and explanation.
wyatt1153 Thanks
What if you have push start you can't turn on key
You do a great job. Your instructions have helped me with multiple Maxima projects over the years. Keep it up. Thanks Brother.
jim heal Awesome man. Glad to help!
Check engine light will come on and show code p0105 and/or P1105. I'll try to shoot a video for this sensor this weekend.
Very good info
p1400 is the EGRC solenoid valve. What's the year, make and model of your vehicle? I can post repair diagrams on my pinterest acct
Could u send me the diagram on a Nissan maxima 6th gen 2004 please, awesome vid!
just bought a 1998 Infiniti I30 and my whole SAE [PP] >PP< tube was at the bottom of the engine bay, now i'm worried about what else isn't connected lmao wish me luck this is my first car and never learned anything about cars so i'm teaching myself 😎
Thanks, Omer. More to come. Cheers.
This is good info to have, but didn’t cover my problem. The green clip won’t always or usually snap when I put the sensor in. The connection is rather loose. Not sure how to fix this or even what part to shop for.
Gotcha. You can actually replace the harness connector. Typically you'll have to purchase an entire kit full of adapters. Try ebay first. You may be able to find one.
Okay I replaced the mass air flow sensor but when I drove it it was coughing puking and when then it died but when I restarted it and move some wires around it stayed running normal could it be the connector or the wires and where does the black read and white wire go
Excellent video!
Thank you
Bro finally the maxima video thanks a million great video
Should the out put voltage increase of idle if afm is good
Do you still have your 97 Maxima? because I've enjoyed your DIY informative videos.
I am having a problem with my 97 Maxima-- since replacing the MAF sensor connector __ the car dies when connect the MAF, but runs when disconnected.
What do you think is happening?
Excellent video, thanks for taking the time to create this.
Glad to help, Servando. Cheers
Mine shows at 1.75 is it good or is it bad?
Awesome video, exactly what I was looking for
jaqviolet Nice man. Glad to help
Hello there, I have a 1995 nissan maxima se and I have code p0110. Can you show how to trouble shoot it please. Thanks in advance!
On the maf when the car is running im getting 14.1 volts... Is it normal on the idling mode... Thats nissan sunny fb15 exsaloon?
Awesome video, I recently cleaned my maf sensor and i notice the increase of power. Quick question, after cleaning the sensor, I feel that my speedometer doesn't match my actual speed. It displays a lower speed. Any suggestions? Thanks
Bro got a p010 code and need to change the front bumper cover on my maxima plz help either with a video or written instructions thanks a lot
My buddy has a F 350 that randomly, when he hits the gas, wont respond and stays at idle. He has this happen where he gets no response from gas pedal but it just idles. Then he restarts the car a few times and it will go away. Does this sound like the mass air flow sensor could be the culprit? Also I was thinking the newer drive-by wire pedal might have a malfunction in reading the senor position. But I've also heard someone who had a bad alternator that put out too low voltage and ended up causing a faulty mass air flow sensor so they both needed replacing. Any ideas? So far the cpu is throwing no codes...
Thanks for the videos, they're so awesome.
John Smith Hey John. It sure could be the MAF sensor. You may want to check if the vehicle has any trouble codes but a faulty MAF sensor could inhibit the vehicle from accelerating. (On my Maxima, the limit is 2400 RPMs) Also check for vacuum leaks.
Do you have a link where can I buy of maf sensor . Sir .
What about this being the cause of po171
hello, I have a 97 Altima, and it idles rough then it turns off, but if I disconnect the MAF sensor it runs fine and does not turn off at idle. I did your test, it passed the first one, then I did the second part of the test by connecting the paper clip into the plug of the MAF as the car was running and it gave me a reading with higher voltage than norm. (about 15.3v) Yes it has check engine light on. Not sure of the code. I believe it was PO340 something with the distributor which I already replaced. Any idea? Also I bought one new MAF and a used one and both gave me same reading.
jomar rodriguez Okay. When you tested the MAFS with the paper clip, which terminal are you testing? If you disconnect the harness connector facing up (the little notch that you press down to remove the sensor is facing up) you want to test terminal 1 which is the terminal all the way to the right. (Should be all the way to the left when connected.)
+CarsNToys yes that is the one i tested.
jomar rodriguez basically its the one with the white cable like the maxima its very similar
jomar rodriguez 15v is way off the charts. The voltage for your car at idle is between 1-2 volts. A high voltage will cause your engine light to illuminate for code p0100. Other symptoms of a bad MAF sensor is hard starting/restarting and detonation. On some vehicles you can't go above 2500 rpms because the vehicle enters a fail safe mode. If you performed the test correctly sounds to me the sensor is no longer working. I'd check first though what engine codes the car has.
CarsNToys thanks man!! I'll check again.
Thank you very very helpfull
joewalker99969 Welcome.
@@CarsNToys My infiniti i30 is cut off while giving gas, what could be the reason?
Sir can I just remove and clean my MAF sensor without using the reading?
I'm not understanding something. You're saying that if all of these readings are good and within the right range, my only choice is to replace the MAF sensor?
I would think that, if it passes all of these tests, that means I can consider my MAF sensor to be in good shape, and that I need to look for the problem elsewhere
Joe you are checking if a bad connection is sending a false reading. if the connector is good, than it has to be the maf
Goodday..i have p0100 on the scan..mass or air volume air flow on circuit..can you help me what it means..
I have a 2000 Infiniti i30 that constantly dies after getting a jump or even having the battery fully charged. I thought it would be the alternator or belt but I have replaced it with new ones and it still does the same thing. The dashboard lights flickering until it completely cuts off.. what is the problem?
thank you nice work ......
Hassanalberta Hassanalberta Glad to help. Cheers
thanks bud, It really helped, I did the test on my 95 Nissan 240sx and the readings like you did and numbers came out about the same, question though when I did the check between terminal 3 and ground I got back 13 Volts isn't that a bit high?
Martini Gasalini Was the car running by chance?
No it was not running when I check terminal 3, ignition was just in on position.
I was getting only 10 volts
what causes engine stall and enging checkblight nissan serena[ at]
Hi, I read that the MAF doesn't always throw a CEL. Is that true?
+Simply Z Yes. You can also purchase a cleaner specifically for the MAF sensor
+CarsNToys thanks dude! I appreciate you getting back to me. Do you know of any common symptoms when it's going wonky?
+CarsNToys can this be broken and not showing the check engine?
hello i have a 2004 nissan 350z and i am getting a code P0103 it is saying it is a MAF problem and i was wondering if you have any suggestions because the nissan dealership wants to charge 1500 to also replace the cam and crank sensors
But how do I replace the MAF???
My car don't start but when I put in the computer to see what's wrong it told me no measure air flow I don't think enough air going into my egine
I have a 1996 Nissan Pathfinder which recently would start jolting and bucking while driving and when slowing down or coming to a stop would stall. This was periodic but now it'll crank but won't start. I did the test between the third terminal and the ground and was reading between 1-2 volts. So, I figure the connecter is bad just not sure what steps to take from here.
+Davis Drury Check engine light on? If so, what are the codes?
+CarsNToys Yes, P0100, P0325, P0161.
+Davis Drury Hope this helps: czcams.com/video/Eps7jk05aWw/video.html
+CarsNToys Alright, thanks.
Same problem on my 97 Nissan 4x4, 4 cylinder. Codes are P0100 & P0135. Although the last time I cleared the codes there was only P0136. Does a problem with the MAF trigger false O2 sensor codes? This youtube link no longer works. Can you re-direct me? Thanks!
Hello, I have 1997 Nissan maxima, and when try to start to my car it would die immediately. This usually happens after a day or two of not driving it. In order to start the car successfully, I would have to step on the gap pedal as I start it. This has been happening for almost 2 years and my check engine light has not lighten up ever. Within the last month, sometime when I start the car, the rpm will jump between 500-1500 rpm back and forth for like a minute. I don't know if this is related, but would you think this is mass air flow sensor causing my car to not start normally
Ethan Lau If the MAF sensor is bad, you'll be unable to get the car above 2400 RPMs. (The car would run in fail safe mode.) It sounds to me you have a different issue. Have you checked the spark plugs? Also check the PCV valve. I have a video for both of these issues and both are performed on a '97 Maxima. The other thing to check is if the car is running on all six cylinders. You can do this by disconnecting the coil pack for each cylinder (one at a time as the car is running) and see if there's any change. If there isn't then you know that cylinder isn't firing. If you're not sure what a coil pack is just watch my Maxima spark plug replacement video.
I have a 97 Nissan Maxima and when I get it up over 2rpms it just jumps and sputters. Then when I take my foot off the gas it shuts off. I did replace the Air filter and cleaned the MAF sensor. Worked for 2 days then it went right back acting crazy in the same manner. While I was at the parts store I had them run the tester on it and it came up with these 4 codes P1447, P0100, P0130 and P0325. All these I believe deal with Air flow. I did (before I found your video) go ahead and replace my MAF sensor. So now of course this did not work either. So now I have to do the other steps that you talk about in your video. But I have a question and this may be dumb but here goes, Does the electric that goes to the MAF sensor have a fuse that could be busted? Just thought !!!!!!!
Cheryl Williams Sounds like classic MAF sensor issues. If there's a problem with the MAF sensor, the computer cuts fuel at 2400 RPMs. Out of all these codes I'd be most concerned with p0100 - MAF sensor. Run the tests I show in the video and let me know if you need additional help. (The sensor doesn't have a fuse. It runs off a large relay)
CarsNToys Ok I will it is raining here today so as soon as I can I will do the other tests. I have already replaced the MAF sensor, but do I have to disconnect the battery after and let it reset the system?
It's still doing the same thing. I'm just at a loss getting a good 12v read so I'm at a loss . I'm just getting so frustrating.
You have a broken wiring harness at the right strut tower in the engine compartment. There is a Nissan service bulletin about this problem.
STOP. STOP. STOP!!!!!!!!!'!!!!!! DO NOT REPLACE ANYTHING!!!!!!!!!!!! I am a Nissan service technician and can help with these problems.
When you have random multiple codes and poor running, the problem is most likely a broken wiring harness at the right strut tower. The engine mounts in these cars are allowed to get soft, then the engine rocks back and forth too much.
There is a technicial service bulletin about this.
Basically the main engine harness needs to be opened up behind the right strut tower and the harness repaired.
Then replace the engine mounts to eleminate the excessive engine movement.
hi i got a 98 infiniti i30 with the same engine as the maxima from 95 to 02 and i chaince the maf sensor but the car wont runing right and when press the gas the car move slow and i chance the cam sensor y fix the timing problem and the fuel pump
and the car last time i chance the battery and work find and this time its got the maf sensor problem
Any other issues / trouble codes?
CarsNToys yes i got no acelerate
Have a 03 g35 runs great till I hit 3500 rpms then like it cuts back bad
That's a typical symptom of a bad MAF sensor.
i got code po 1105 and po 1105 pd on my 99 nissan altima any suggestions i appreciate thank you.
+MARCO CURIEL That's the map and baro switch valve....czcams.com/video/a7eMmzW6zKI/video.html
I have a 2001 altima and we think a sensor for the air conditioner needs to be replaced any clue where that is?
Sabrina Hodge Hi Sabrina. Can you be a little more specific? Are you thinking along the lines of what controls the a/c compressor to turn on and off?
CarsNToys some times it will blow cold and most of the time it is hot. We have replaced the relay switch. And also the valce on top of the compressor. Before we replaced the relay the compressor did cycle off and on but now that issue is fixed. Now its the mystery of why it isn't cooling. We put freon in it. And checked it and it still says full.
Have you checked the a/c condenser? I've seen them clog up with leaves which inhibits airflow; which in turn inhibits cooling.
Sabrina Hodge Also check out Scotty Kilmer's Channel. He has a few videos concerning AC systems.
Hi I have a 1999 Nissan Altima that has idling problems. It turns when I stop at a red light. it could be the idling air valve control or the mass air flow sensor. I took it to my mechanic and he gave a little overpriced amount for the repair. I don't know if you can help me I just want to figure out if I could just clean the sensors myself rather than buying them new.
Jorge Quiroga Is the check engine light on? If not, check for vacuum leaks. That may be the source.
CarsNToys Yes, it turned on recently. Apparently the knock sensor is bad too but I don't think that could be the problem. I believe the main problems may come from either the idling air valve control or mass air flow sensor. I will check the hoses for vacuum leaks anyway.
Jorge Quiroga Ok. So the only trouble code you have is P0325?
i checked the wires that connects to the MAF sensor on my 97 maxima and found out that they were bad. how can I change them?
Skits Visit your local auto part store. They most likely sell a pack of connectors that will match up to the one you need. Just solder on the new connector. (Take a look at my aftermarket radio video. In that video I show what I mean by soldering wires and using heat shrink tubing.)
ok i will the video out and thanks
my paperclip test is showing 5.0 volts on my 2001 nissan pathfinder.....that normal?
2000 Infiniti i30 reads 2.18 volts I guess it going bad i unplug it and the engine stays on running
i got the P0101 code
MAF sensor is in good condition.
so what else could be the problem
I have the same code with my altima 2011, already cleaned the air filter and MAF sensor.
Next thing i will d o, but i don't know when, i will clean the throttle body. It may be dirty and wont allow enough air to get in i guess.
If you get any solution please tell me!
Humberto García I had the same issue, my sensor was good so I had a mechanic clean the throttle body and didn’t have an issue for another 30-50,000 miles. But now with 155k miles my car will crank but just won’t turn over. Can’t start it so I haven’t had the chance to take it to my mechanic.
what is the name of the black box to the left of the mass air flow sensor?
+Rori Fleur air resonator
+Wimbo Mahadi thanks, I ended up finding out from a nissan car part junk yard.
+Rori Fleur where did u get that? can i buy 1? :D
+Wimbo Mahadi in California near San Pedro there is a junk yard for nissan parts only, there are plenty of these nissan or specific car type junk yards or you can go to 'pick a part' all in LA COUNTY. I paid $75 used part $7 tax, you might be able to order it from them and have them mail it to you.
+Wimbo Mahadi they included the seals and silver circular closure also. it was the cheapest of the 4 locations we could find others started for used part $125 and the dealer was ridiculously expensive
Mine reads 1.6 and it stalls a minute later
I don't know if it's My MAF sensor or what. .when I drive it cuts out . (once while driving the car died but started right back )check engine light is on. Does anyone know what the problem is ..it's 96 Nissan maxima..thanks
+Ricky Sahjal What are the trouble code(s)?
ITS P0400 EGR SYSTEM FUNCTION AND PO125 ECT Sensor Excessive time to enter closed loop ..
+Ricky Sahjal I have a video for p0125 - czcams.com/video/bPAIFL8VH9w/video.html
P0400 I will have a video for shortly.
ok appreciate you ...
Hi I was wandering if you made a video of P0400 ? I saw some Video how to clean EGR but was not clear like your videos are
Hello friend, i have a question where did you buy those diagrams with the specifications how to test components like MAF Sensor, I see that even the pin on the connector is numbered for that specific car, I just bought one at AutoZone store it's called Haynes it's not complete just general information also different types of engine not good for me, I need a book with more in depth information, can you provide me a link where to buy it, thanks in advance, by the way I liked your video how to test a maf sensor my has 5 pins but i do not know which pin it's ground, signal or positive. Give some info about the book if you can please thanks again. My is a 2001 hyundai santa fe GL 2.4 Engine manual transmission. My car clicks when I turn the ignition switch then I tried again and wants to crank but it does not crank, then I tried one more time and it moves the engine slow or the engine rotates slow, any ideas what could be my problem I does not start at all.
my maf sensor 4.5 v at idle and when accelerate the pedal the voltage decreases :)
***** What kind of vehicle?
CarsNToys 94 camaro z28 3 pin cable maf sensor .i checked the power and ground indicating around 12 v but sıgnal wire over 4 volt at idle when i press the gas pedal it goes down like 4.5 4.4 4.3 about around 2000 rpm im suspicious of opti as well
***** You have trouble code p0100?
CarsNToys did not scan it . i was just checking the sensors before opti .i tested map sensor on it as well :) im getting rare voltage reading on maf .and vacuum lines seems to be okay
Gotcha. Some vehicles go in fail safe mode when there's a problem with the MAF sensor. For example, the car won't rev above 2500 RPMs. You can also buy a cleaner for the MAF sensor.
Turn off the car.
This is good info to have, but didn’t cover my problem. The green clip won’t always or usually snap when I put the sensor in. The connection is rather loose. Not sure how to fix this or even what part to shop for.
Okay I replaced the mass air flow sensor but when I drove it it was coughing puking and when then it died but when I restarted it and move some wires around it stayed running normal could it be the connector or the wires and where does the black read and white wire go