PO300... Its not what you think sometimes. Crank Sensor Time!! Not spark plug wires!
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- Äas pĆidĂĄn 15. 01. 2016
- People like throwing away money on parts that are not need to fix this code...Start here first! Chances are this is probably the issue. At least for me it was electrical.
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Wish I found this earlier. Went through wiring to make sure nothing was frayed, corroded, or just plain rusted off. Replaced sparkplugs and sparkplug wires which needed done, along with a ignition coil which it probably didn't need. Then spent the money on an ecm thinking that was maybe what was going on. After replacing the computer it finally decided to tell me the camshaft sensor was reading bad. May just return the computer afterwards after I replace those parts but we'll see what happens.
Yea, I know! Only can try.
Thank You, Thank You, Thank you! I wish this was the first CZcams video I watched cause this was my problem. I've been posting the following on all the other Rough Idle, Misfire, P0300 code videos in case it helps someone else.......:
I post this in case it helps someone.
Had the same problem (MISFIRE P030x). I changed my throttle body, then tried my plugs, then tried my ignition coils, all of it costing me around $300 in parts only to find out that it was my Crankshaft Position Sensor at the transmission. A $20 part! This rough idle, misfire code can be a tricky one!
Try the cheap stuff first my friends.
Nice!!
Thanks for sharing đđ
Aaron, did you have a P0300 only?
I have a P0300 only with check engine light and very rough idle.
Thanks uncle Nate!đđđ
Thank you. I had the same problem. Po300 ran rough with check engine light intermittently. Fixed it with new crank pos sensor on jeep!
Nice work!
@@Yahoo6177 no it was rough at idle and acceleration.
dude you just made my day thank you very much
Mm
MUCHAS GRACIAS AMIGO
Nice video. I am getting Po300 in my '07 3.3L Caravan but it sputters and hesitates upon startup. Sometimes takes two or three cranks to get it to stay running, but once it runs it is buttery smooth while driving. Issue is only at startup. Contemplating having a shop do a full diagnostic or start throwing parts at it.
Nice!
Looks like a cold chatnooga Tennessee day there
Great video
I have a cam sensor to try to change as well as a main connection to the PCM. It's being held in place with broken pop cicle stick. Didn't see that when I bought the truck three weeks ago. So my brother sent me another cam sensor, which is in the distributor. The connector I got at a junk yard.
I once had a jeep that had sticks hot clued in the rear lower control arm...lol Some people.
Good video. Well explained.
Looks like that drive sequence was filmed in the Appalachians.
Cool!
BENT COIL CONNECTOR PIN: I had an annoying and hard to trouble shoot P0300 code on my 6 cylinder 2003 GMC Envoy XL. I had replaced the spark plugs and coils and the code and misfire would not go away. Why it did not trigger a P030x error, I don't know. Just passing this along as something simple for others to check. Have a nice day!
good info. thanks.
Well Well Well that glimpse of the part seems to show that it has an oblong hole indicating that some adjustment is necessary if not mandatory due to a magnetic induction which you have not covered. Proper Alignment is quite often necessary for proper operation especially since the teeth seem to indicate that there is a timing factor (possibly on signal and off signal) and just slightly off can make a difference.
Tolerance's .02" Anything more computer says F this!
If you take a piece of cardboard, not corrugated but the stuff slightly thicker than paper(around the .020'' thickness you are looking for) and cut out a small circle the size of the end of the sensor. Before installing the sensor glue the little circle to the end with a dab of grease. Install the sensor until it contacts the surface of the sensor ring on the flex plate and tighten it there. As soon as you start the engine the cardboard will wipe off the end of the sensor giving you the perfect air gap. Incorrect adjustment on the old sensor may explain the scratch marks and inevitable failure of it.
I having the same problem in my jeep grand Cherokee and I changed plugs and coil and still doing the same thing, thank you for your video, I'm going to change the sensor
Ok...let us know if it fixes the issue!
Is always to change both sensors cam/crank
Ive changed my camshaft senser and cleaned the egr valve which was already in good condition but my fuel pump has started whining so im gonna take a look at that because it can cause low fuel pressure causing a misfire also im gonna replace my coil pack because it happens to be cheap on my car just ÂŁ20 so its worth a shot, the p0300 covers so many things
I know....Its the code from an X wife!~
I'm going to try that I'm going to change both of them and see of that fixes my problem
Let us know if it works! If not I have more Ideas.
Did you get it fixed? What was the problem?
Hello sir " would a bad crank sensor keep an engine from starting? It ran fine the night before , then it wouldnât start the next morning! Got codes p0300 through 1 to 4 cylinders and epc light ! The car is a 2012 vw 2.0 t. And I replaced the battery, plugs and coils.
Good day to you..I had seen when you replace this, it must be relearned via the scan tool...is this correct as I didn't see you do this?
Po302 on my 2006 Subaru sti. Did all the swaps. Vacuum leak check, compression and leakdown test. Crank and cam sensor check, then I'm out of ideas
Nathan, I have a 2004 Nissan quest 3.5 L engine and recently the timing chain was changed when I got the car back I was getting a P0300 code NOW P0305, I installed new spark plugs you coils and new injectors, and I also check compression which was excellent any ideas as to why I'm getting this code? Is it possible that the timing chain can be off one tooth?
You should test the components, not just switch parts out. They all have voltage and resistance settings. See if yours conforms to a "good" unit before you spend any money.
Good Tips!
I have a 2003 Mitsubishi lancer OZ Rally 2.0. One of the headlights didn't turn on so I replace it ( is HD). Afterthat, when the car is turn on or not running it turns off or the power goes very low. It was scan and showed P0122 and P0300 codes and flow mass code. The TPS was installed this year. Before all this, the car was running a little bit low (maybe after replacing the intake) and now is worse. I went to different places they scan it and say the flow meter is bad and is causing the TPS (which is new ) to show abnormal, others say to replace the spark plugs. Please help me with any recommendation.
Did your van sputter and hesiitate at time my ram is doimg thr same thing and i have p0300 and 05 but it dodnt come up till i swaped the IAT
Well what did ur scanner code read?
PO300 - could be the ignition coil, fuel pressure, cracked distributor cap, spark plug wires, spark plugs. Just had a PO300 on a 96 jeep (4.0) ....it was the ignition coil.
one time it was the crank sensor
I had this code and it was the $10 PCV valve.
Hello amigo I have a 2006 honda odyssey whit p0300 p0172 and all the cylinders misfire from cylinder 1 to 6 and take 2 cracks to star I need help ,no vacuum leaks ,has new sparks
I have the code on my 2000 Chevy Blazer (p0300) I changed the gas cap to a locking cap, fuel filter, distributor cap and rotor button, EGR vale, spark plugs and wires and ignition coil and air filter the code still appears, I'm going to clean the throttle body and mass air flow sensor, and I was wondering if the cam sensor was an issue and if I still have the code I was going to change out the air intake sensor and hope it's not the fuel pump or fuel injectors. My blazer does a long crank to start but it does start and has a bit of a lope to it. But runs pretty good when moving down the road.
I still get mine on my 06 charger 3.5. I changed the sparkplugs, recoils, and battery.
I have a 2010 charger 3.5
And I changed cam sensor (top of engine and cranks shaft (bottom of engine near converter )
Fixed the issue but slight sputter and feels like it's gonna did but better then what it was
I got a p0300 .. I noticed when I take my pcv valve off it runs better but when I put it back it dies⊠I replaced the pcv and it still does it .. ??
Mine was fuel injectors! Take to a shop to let them diagnose it for u, or u will throw money into it
Nice!
I have a 2008 uplander 3.9. car idles horribly. Cannot find what is wrong w it. Replaced spark plugs, coil pack, etc. Fixed chafed wire from vvt sensor . Move maf sensor volt jump. Replaced fuse box. We are just dumfounded please help!
@Nathan Rohrbough. Hi Nathan, My son's 2009 Sebring LX Sedan 2.4L is showing the following, w/2 codes twice: P0300, P0456, P2004, P2184, P2181, P0300 & P2004. In that order. So with double P0300 & P2004, is it possible that it's trying to tell us that it's a bad Crank & Cam Sensor & also the P2004 shows up twice. He's told me this car has been a $100 a week ride for the, '' to & from the 1 mile round trip to work & back home..... I just replaced the Plug's, Coil Pack's & with both Thermostat gasket's leaking, that should have taken care of 2 of the codes: P2184 & P2181. Thus leaving the P0300, P0456, P2004, w/2 of them twice... So what, the Crank & Cam Sensor and the Intake Manifold?
What made you think it was this đ§
P0300 misfire from cynliders 1 3 5 any help
I figured out my code po300 on my 1998 chevy 1500 pickup with a 5.0 engine. it was the bolt that holds down the distributor came loose.
Nice man!!
Ive never seen a puel pump
That looked like a 3100 v6 engine...just curious abt how many miles was on it? It would help to pinpoint an expected service life of the crank sensor. thx
I think 136,000 miles. You never know about crank sensors...they give no warning there going to go bad.
It could also be distributed cap and rotor I had the same problem 2 yr ago and recent
Yes shorts will do that also.
@@FixingWithPassion What does the ECM do, tell each Coil Pack when to send Spark? Or is there yet another sensor hidden on the engine for that
Same thing happened to me.. crank/cam sensors and a battery fixed it
Nce!!
Was on my 2006 Ram Hemi
Was it throwing P0300 code as well?
@@AnythingEverythingGh Yeah. Careful of this.. The roller lifter could have seized and ground down a groove in the camshaft lobe which will cause misfiring. It's well documented. I ended up selling off my 06 because this was happening. The sensors helped but did not solve the problem.
Is it my crank sensor same codes after changed sparks and coils
Just remember people, parts store brand sensors may work shortly. But usually fail within a couple months or sooner. When it comes to cam or crank oil oil pres switch. Use dealer only parts most times they are close in price or sometimes cheaper. Also some vehicles like fords or dodges the crank sensor circuit runs through the oil pres sw
Prof? Never really had a issue with after market parts now days. Maybe back in the day.
I just put a new crank sensor on not a week ago. So check the cam sensor now?
Did you figure out your problem? I have P0300 code only, with check engine light and heavy shaking misfires. You only had a P0300?
I have a 2008 Tahoe hybrid. The dealer spent maybe 40 minutes in the back and came back telling me my P0300 meant I needed a new engine and quoted me 10k! I have the exact same problems. P0300 when I bought it (as-is from an online dealer... yes, an idiot move) but it changed to p0305 after I changed all spark plugs. Changed wires and coil pack on cylinder 5 and problem has gotten worse over time. I now get violent sputtering when accelerating from a stop and the check engine light flashes constantly. When in reverse it won't go, then suddenly jerks backwards after letting it go by itself. My finances are in shambles and I wish I knew more about cars so I didn't get ripped off like this
Could be so many things from a bad connector to a vacuum leak. This service bulletin should apply to your truck. You would have to pay for the part and repair, although u can do it yourself.
TSB #12-06-01-001B: Service Engine Soon Light On, Rough Running Engine, Cracked or Oil Fouled #1 and/or 7 Spark Plug - (Jun 1, 2012) 2007-2011 GMC Savana, Sierra 1500, Sierra Denali, Yukon, Yukon XL, Yukon Denali, Yukon Denali XL Equipped with Gen IV V8 Engines Built Prior to February 1, 2011 Some customers may comment on a service engine soon light being on and/or rough running engine. Technicians may find DTC P0300 set. Upon further investigation, technicians may find cylinder #1 and #7 spark plugs oil fouled and/or the porcelain may be cracked or broken on the combustion chamber side. This occurs on the driverâs side (left side) of the engine due to PCV pullover that adds additional oil to the cylinders that can foul out or damage the spark plugs. Important: If Corporate Bulletin Number 10-06-01-008C has been previously performed, then a new valve cover may not need to be installed. Please look for the second design baffle with the square hole at the end of the baffle. Install a new left valve cover with the revised baffle to prevent PCV pullover that adds additional oil to the cylinders.
Read more at: www.obd-codes.com/forums/viewtopic.php?t=13597
Copyright OBD-Codes.com
I'm having this same issue and I have a 2009 Nissan Sentra. I recently changed the spark plugs, cleaned the fuel injectors, checked for any vacuum leaks and nothing however the code P0300 still came on. Today I took it to the mechanic and he replaced the old crank shaft sensor for a new one and so I'm going to drive around and see if my light comes on still. Any idea what else can it be or this should do it?
Wez Fitness so? Did it came back on?
Some times a cam spencer will crack an have oil in the wires an not run clean it an it will be fine for a few days
Gotta watch for the pressure bearing they like to lock up
Hello, please help me. I have Nissan Juke 2015. A problem started a few weeks ago. When i start the car it's ok but after 30-40 minutes of driving when car reaches some good temperature, and while I'm standing in heavy traffic or standing on idle sometimes it starts shaking on idle (rough idle), and whole car is also shaking. I went to mechanic and we changed spark plugs, it did not help, then we changed ignition coils, it did not help as well. Now mechanic says that could be a computer problem. When ever i give a bit push on a pedal or turn on the AC it fixes, but when i release pedal and let it be on idle, it starts shaking again (sometimes it even goes away by itself). I also plugged into computer to a diagnostic and it does not show any code until it starts shaking, when shaking it shows this "code P0300 multi cylinder misfire". What is your opinion about this situation and symptoms i told you? Can this be an injector or some sensor/cable problem? Thank you
also cap and rotor , injectors also can cause bad misfires and no start like a crank sensor... you were lucky... when you own a car for many years you get better at knowing its problems and fixes...
Yep just did coils PO300. Who would have thought.
I have a 2006 highlander hybrid with a VCS Trac off check engine and brake light on any thoughts
Check the gas cap seal. I've see this several times. Then check the brake fluid level. Go from there.
May I Know when you do the diagnostic, will fault code P0300 come with another misfire code like P0301-P0304? As my car Renault Megane 1.6 having P0300 and P0303 misfire code, and I have change the coil, spark plug and fuel injector but still having the problem, If p0300 come with these code, I'll probably to change the crank sensor. Thanks
Check your fuel pressure also. It should hold fuel pressure after you shut it off.
how to check it?
Did crank sensor fixed the problem?
My 2000 Camry 2.2l is giving p0300 along with p0302 and 303. 302 and 303 are cylinders 2 and 3 misfiring. Iâve changed the plugs, wires, and the cylinders 2 and 3 ignition coil. Iâm stumped, so I may try this next
Any update?
@@paquesepas6696 ended up being the timing belt. I replaced it and the water pump and thermostat since they were right there as well.
Hello
I have 2003 nissan 350z
Code PO300
I have changed all the spark plugs and coils
No vacuum leaks
Im guessing its the crank or camshaft sensor?
The engine shakes and misfires under acceleration.
Idles rough like it wants to stall but then idles back up when at a stop or parked.
Should i change the crank sensor first?
Also has new fuel injectors.
Also my gas mileage is not what it used to be and the car doesnât drive the same.
Reply asap!
I have an 05 Cadillac Srx with a po300,301,303, and 305. It will not start. I checked fuel pressure and it is good. Any ideas?
Backyard Foodie those are cylinder codes. Telling you what cylinders are bad
Did you have to go thru the relearn crank sensor protocol?
no
It worked without relearning it???
first thing to do is check for vacuum leak AND low fuel pressure
P0300 means random/multiple misfire
if this code shows alone check something that would obviously cause many cylinders to misfire
on most Chevrolet truck with SFI (spider fuel injectors) those things can cause misfire
Right....but this case was a crank sensor....go figure....now my 1999 neon....PO300 +PO301, PO302, PO303 and a PO304....... got a feeling its going to be a bad fuel pump regulator...I got's low fuel pressure ;(....and it bleeding off pretty fast.
one of those pressure regulator with vacuum hose, came with oxygen sensor code saying it is bad or rich and engine ran with strong rich smell
it was leaking out from there and engine sucking fuel into it
check this part too
always check what is working and what is not working correct
it was 2004 Chevy cavilar
also check fuel filter it might got clogged but change it also for maintenance
Right. I've determined its a fuel regulator causing my issue on my neon PO300. Everything else checks out....ugh....now I've got to pull out the fuel pump, drop the tank.....ugh.......sometimes I wounder why I do what I do....
it is always a little things that computer doesn't like
I got a car 2007 Renault Megane and owner driving it and the timing belt broke and bent valves so I repaired everything and it runs perfect fine, doesn't even sound like misfiring and came with flashing engine code.... ONE code P0300
I was googling around and i find this video
Have you ever had a PO300 and found out it was low fuel pressure etc? I've never had that happen to me until now I think.
It's funny because a p0300 will even take you to your wallet and you try to diagnose the wallet because it gets tireing that in the end a bolt was to tighten... With the crankshaft sensors I feel like magnets when I hold them..
The 2 wire sensor is magnetic like the pickup coil in a distributor the 3 wire is an electric magnet style take the 2 wire style and pass it by a conductor and you should get a pulse
I have a 2007 grand caravan and misfire in cylinder 2 I put new plug wires any suggestions how to fix it ?
New spark plugs (gap them correctly no matter what people tell you.)
Replace Ignition Coil-pack. ($32.00)
Compression test that cylinder. Possible bad valve(s) in cyl#2.
How many miles?
I have same issue with 2011 journey 3.6vvt with code p0300,, should I need to replace cam sensor.."
@@DevJB i changed bank 2 cam solenoid.. no more code for misfire
@@shivverma9119 Awesome! Those I would have tested after the sensors. Glad you found it! Take care.
I have a 2004 Nissan Quest I had swap my engine with a 06 Nissan Maxima I have a p0300 code I had changed injectors and coils spark plugs 2 cam sensors mass air flow sensor compression test do you think I have a wiring problem when I unplugged the mass air flow the van was running good when I plugged it back in the misfire started back up with the flashing engine lights I'm getting tried of throwing money way trying to figure this out
Yea....lol probably
Thanks I'm gonna check the wiring harness and a computer update I think it might be corrupted
08 dodge avenger rt ..replaced crank sensor, p0300 gone.
Same with my Jeep!
I just replaced my crank sensor and that's when I got the p0300 code. Any suggestions on how to fix it?
Fuel pressure
@@FixingWithPassion I'll look into it. Never had any issues until I replaced my starter and my crankshaft position sensor. Have you heard of the relearn process on GM crankshaft position sensors?
can somebody tell, why mine shows a P0300 , but the engine lite comes on at about 3200 rpm, and after it changes gears it setlkes down and lite goes out..it runs normal on take off, it's just when it gets under a real load, that it does it
From what you have said, you will need to go down to Auto Zone and rent a compression tester. Follow the instructions to the letter. Compare your readings to what is listed in your repair manual. Then squirt a little oil into the cylinders one at a time ... as you retest the compression. If the readings are higher with the oil added, then you will need some head work done on your vehicle .
Hey brother I have an 2008 Cadillac STS with p0300 p0302 p0305 I changed the plugs and the coils are tested to be working properly I've had a code for a crank or cam sensor when I first bought the car but I didn't think it could lead to it I tested the codes but no sensor came back on
When the engine gets warm the coils can still break down and missfire. Change the coils around and see if the if different codes come up.
The codes didn't change same cylinder misfires
Ok then that tells a lot. You have to start looking at those cylinders. I'd Do a compression check. Do those plugs in those cylinders look different from all the others meaning darker, lighter? Sounds like a slight miss.
TVWXMAN32 my CEL blinks occasionally when driving it. The car when getting off the line accelerates very slowly feels fine after I get the rpms up in 2nd gear .
TVWXMAN32 they all looked the same when I got the car it had a problem where it wouldn't start at times changed out the battery it never gave me any issues untill I pump gas it struggles to start
I have a Skoda Superb which has a misfiring cylinder. Changed all the spark plugs, there was moisture in one of them, the car was normal for a mile or so, and it again started misfiring. What to do next?
Pull one wire or coil wire and see if the idle changes. If it does
NOT...then you've found the cylinder...then go from there...could be a
bad coil.
Throwing parts at your car is the worst possible thing to do
Yes, unless one is rich and don't care. I say rule out things and start form there. ;)
True, it damages the paintwork. ĂÂżĂ
Its better if you install them.
Throwing parts and money at it per se opposed to actually locating the issue is sad.. 99% of being a mechanic being able to diagnose the problem at hand .PERIOD.
The way I see it is any old Joe Blow can replace or swap stuff out in which is the 1% of the job....that doesn't make you a mechanic! A mechanic does the above mentioned along with the other 99% in doing so..
+bmoresonly Most ill prepared mechanics will throw parts at a car if they dont know how to properly diagnose and understand how obd2 system works. for example, some people see an O2 sensor and will change the sensor right away only to have the service engine light come back on. I had an issue on my car where it showed an egr valve pintle position and no one could figure it out until i spent a good day looking at stuff and it turns out the egr was installed completely in the wrong position, this is possible in the linear style egr on the 96 and up vortec engines using a dizzy. Thats why i stopped taking my car to the mechanic and learned obd2 and learned more about it so i can do my own repairs.
How erratic,because it should throw crank sensor code. It doesnât matter if itâs not completely dead
Erratic...just like my x was....O-o
Lol this is chevy ur talking about iv had a coolant temperature sensor throw a p0300 code and made my tahoe run like shit.
Did you get multiple mifires in different cylinders as well?
I'm getting several po30x's as well as one torque converter code and read it in a forum that one guy experienced these same codes right before his crankshaft position sensor went out but I only seen it once in all my research so far.
You can
Did you ever find out the problem
Po302 single cylinder misfire staying the same
Nathan great video; thank you Bro. Listen I have a 2007 Nissan Sentra and one day when I started running all the sudden started a weird noise like âpop pop pop popâ so the mechanics discovered that the engine was out of oil even though three months before I did the oil changed and then we realized that one of the spark plugs got oil on it so another mechanic suggested that could be the intake manifold gasket and we changed but the problem still there. Any suggestions or help would be great. Thank you body
The seals on the intake where the spark plugs go are bad.
Should've changed the valve cover gasket which is easy to do.
Would a corroded battery terminal do this code too? My 99 Sierra 1500 has this code whenever it doesnt want to start. Every 3 months or so I get a 1 click when I go to start it with nothing happening but the lights all turning off while trying to start it. I undo the battery and scrape the connectors with a wire brush and it starts fine but the code disappears. Would the bad connection to the terminal thats causing the starter to not turn over the engine also cause the codes because the spark plugs aren't firing correct? The code never returns until it wont start again because of the same thing
No.
@@FixingWithPassion So removing the terminal to scrape the crud off it is just dumping the codes. I was afraid of that
Thatâs going to be a coil guarantee itâs going to be a coil
Cool!~Thanks!~
I have the same code on my Nissan 2003
O no!
my car would start but it also take it's time,, then when i am sitting at a stop light it will, idle down like it wont to stop but if i hit the gas it's fine. So the check engine came on in the codes was PO300 but i hope it's the plugs. I already changed the cam and the crank and the jerkin stop.
Crank sensor....in most cases it causes that po300 code! Seen it alot!
TVWXMAN32 I have already mentioned that I did but the only problem is it actually like it want to stop but it don't.
O I SEE....You mean it wants to almost stall at a stop?
Distributor will cause a misfire too
True;D
Im getting po3o3...
Changed plugs,changed coils,changed ECT SENSOR..CEL STOPPED..NOW I DRIVE UP TO 200 TEMP.I GET po3o3 again,car will not accelerate...It runs great cold..misifres when at normal eng.temp..what gives,thanks for any info
Auto smooth tho.
What.?.im screwd, im giving up,taking it the pros, i guess.im bumin..ill ask when i take it for thier 60.00 diagnose, yikes..again it runs great till warmed up.and fans wont run...
Ahhhhhhhhh
@@FixingWithPassion
Pricks at auto zone...sold me a bad coil pack..
same code same symptom with my 2005 buick lacrosse, got lucky, just replaced ICM and problem gone.
Thank you so much for posting this comment because this was the same problem with my 2005 Buick Lacrosse and I changed my ICM also and it fixed my problem too đȘđȘđȘ
@@minefeesdee3276 you are welcom, I learned it from other people too.
I have these codes with my car P0301 P0304 P0340 P0341 P0300 and I have changed the crankshaft, camshaft, battery, spark plugs. but it didnot work for me I have only 50000 miles on my Honda accord 2.4L. I have spend over a thousand dollar but I still couldnot figure it out. Any help please.
Fuel pressure check
@@FixingWithPassion thank you I will check and let you know. If it did work or not.
Occasionally my 2004 jeep liberty c.e.l light will throw a P0420 then a day or 2 later it goes away
Now its showing a
P0420 & P0300
I wonder if they are related?
Frank Fitzpatrick same here I get the p0300 often but the p0420 pops up from time to time. My guess is the misfire is causing the p0420 but until I fix it idk for sure.
I have a Nissan Altima 2006, my car is basically doing everything you described. It jerks when I pass 3000 rpm and specially when I switch into 3 and 4th gear. It sputters and I know I have lost a lot of power because it takes longer to accelerate and I my burning more gas than before (which led me to believe it is a vacuum leak). After spraying throttle body cleaner, at every intake hose and gasket, there was no change in rpm. A mechanic I went to once supposedly changed the MAF sensor and Crankshaft position sensor 3 months back so could it still be the problem?
Any help regarding this would be much appreciated!
Check the spark plugs for shorts and the plugs for cracks....this happened to my ford taurus.
O also....the crank sensor will cause the same issues if its getting bad!
Let us know what the issue was if you find out.
I will check the plugs for cracks and also the fuel filter because I noticed the first midfire while going up hill and I read that is a common symptom of the filter.
My crank sensor was changed a few monsth back when my car wouldnt want to turn. My MAF sensor was also replaced with dealer parts so I highly doubt those can be the problems.
But thanks for the response, I will let you know if and when I get it figured out.
Turns out I had a blown head gasket. Found liquid (water and oil) inside the head in two cylinders. I am being changed 1400 for a gasket replacement, head resurfacing, and new valves and some new sensors. So basically rebuilding the entire head. Is that an average price?
my chevy silverado after going over 60 mph throws a po 300.need help on this one.
Hummmm....
Mine did ,,05 GMC 2500 HD ,,6.0L after 65 MPH ,,flashing light ,, but No apparent skip ,,smooth runner ,,did some research ,,replaced cam sensor $ 40 No more light ,,
Nice Fix!
too many things it could be. anything from a vacuum leak to a bad injector. best way is to find a really good mechanic that has a scan tool and to positively diagnose the issue and tell you what it is. Too many mechanics will tell you, well there Joe, it could be an O2 sensor or heck Joe, might be the ECM. Then they start replacing parts left and right and most use cheap parts and your truck now is full of cheap aftermarket parts and will break down faster in the near future. if you know someone with a good scanner they can read the parameters and pin point to the problem. hope you found the problem.
Scan Tool ;)
I hanged spark plugs last night and now the van is acting funny. Itâs shakes when on, the check engine light is blinking and I got the p0300 code coming up.
It can only get better with brand new plugs almost always. The two things that can go wrong or you got the wires in the wrong direction if it's the distributor type and not coil over plugs or you swapped a dual parallel wires on a 200 for you broke one of the wires pulling it off. The only other outside possibility is that you've got a leaky gasket that's letting water into the cylinder anyway
i changed spark plus, crank sensor, starter, spark plugs, coils, fuel pump..... i still get P0300 car has no symptoms. does not loose power.... when i start it hesitates once a blue when it hesitates theb engine light come on with p0300. car turns on like new no noise smooth smooth side wtf is wrong with my car? i dont get it... p0300 is a dmn scam.
i also checked hoses, u checked vaccum leaks, nothing... u checmed fuses nothing computer is good .. i dont get it
What Kind of vehicle is this?
I'm having this same issue and I have a 2009 Nissan Sentra. I recently changed the spark plugs, cleaned the fuel injectors, checked for any vacuum leaks and nothing however the code P0300 still came on. Today I took it to the mechanic and he replaced the old crank shaft sensor for a new one and so I'm going to drive around and see if my light comes on still. Any idea what else can it be or this should do it?
blown head gasket get the gasket from the dealership. Do head gasket test to see if the anti freeze is mixing with the oil
i did my blown headgasket and it fixed the issue
Alynight wow nice. And they have changed the head gasket seal a few days ago and they didn't tell me my head gasket was blown so I don't think that is the issue for me..
Boy I'd check the fuel pressure....My 2997 neon did this and I found that the fuel pressure was dropping when parked...I replaced the fuel reg and it never happened again. Just saying.
I CAN'T FIND IT CRANK SENSOR MY 2005 HONDA ODYSSEY...ANYWHERE..
CAN YOU TELL ME THAT LOCATION FOR MY CAR?
It should be on the bottom of the engine....near the crank pulley.
thanks bro
stupid sensors
I have a 2007 maxima and I changed everything u could think of and the car still idles rough and throws the P0300 code ... HELP !!!!!!
Duane Virtue ...when you said you changed everything...what did you change? ?
its sputtering idles rough ..I checked everything .... just Giving me p0300 code but no other code for a cylinder misfire
Duane Virtue Did you change the crank sensor?....
I put in new plugs ... I changed the fuel rail with Injectors ...I thought it was bad gas ... emptied the tank...change fuel pump
Duane Virtue ...I would have told you not to do that....if I knew. Sorry you had to wast $ doing that.......it's electrical or a sensor somewhere that's throwing that code.
Wouldnât a crank/cam sensor throw its own code though
sometimes
35 years and you throw parts at it with no daignosis?
daignosis is over rated....use your brain
@@FixingWithPassion I always wonder why people would spend an hour of labor to identify whether or not they should replace a $36 part. I figure, replace the part, even if it doesn't work, I saved $50 and I have a new part.
Buy a decent scanner not that autozone crap
Word!
Hi, I have a 2007 Toyota sienna that has the P0300 code, as well as P0356 Ignition
Coil F Primary/Secondary, and the oxygen senses were throwing codes as well.
It started as just the ignition coil and oxygen sensors and now the vehicle has
starter misfiring. I just replaced the spark plugs as they were due. I have erased
the codes but they just come back. Any help would be greatly appreciated.
Thanks!
Check crank sensor. May be bad.
Is there any way to test it?
Not really. It it a dead miss? or just random? Thats importain to know.
It seems to be completely random, and now when you start it up
you can tell its running rough.
I'd check all the coils and see if one is shorting out ...firing through the side of the coil through the rubber on to the engine spark plug hole side. Note: If it was not missing before you did all the work then you may have broke something. Check the coils first....if there ok, then I'd look into the crank sensor. Could be just bad, but odds are slim.
Great video