This Corolla Came From 2 Shops & Still not Fixed - P1605, P0171 Diagnosis
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- čas přidán 6. 09. 2024
- in this video I'm gonna share with you how to diagnose and Fix DTC P0171 System Too Lean Bank 1 & P1605 Rough idling on a Toyota Corolla! Enjoy! #toyotacorolla #checkenginelight #P0171
I worked within Dealership Service Departments for 35 years, now retired and I can tell you, running across technicians of your caliber is like finding a 4 leaf clover or a unicorn. You Sir are a credit to your profession and I hope you find all the success that a hard working, dedicated man like yourself deserves.
@imagingconcepts Thank you so much, I appreciate it!
My african brother you don't know how your videos have helped me at my autoshop in Nigeria. This one is a special appreciation post this man deserves his flower's 🎉
@seunfire Thank you my African Brother from Nigeria, I'm so happy to hear that!
I've been a technician over 30 years now, I really enjoy videos from the next generation of young men and women in the field.
Well done
@keltecshooter Thank you Sir! I appreciate it!
I need to learn this but I live in Chicago
This is easily the best video I have ever seen. It perfectly explains the relationship between fuel trims, and o2 sensors, fuel supply, air and vacuum. I just went through my truck chasing a no code misfire and very bad fuel trims. I found a point where my fuel psi would completely drop to zero and spike back up. I found my ACDelco fuel pump purchased one year ago that only has 6k miles on it has a low fuel pressure with random drops. Wiring between the fuel pump control module look better than they should for their age. 😂. Voltage to pump is strong and constant. Now I am waiting for my warranty replacement and trying to burn up all the fuel in the tank. At least when I was in there last, I replaced all the fuel lines. I am going to inspect the wiring very closely when I get that tank dropped. I have heard that can be a problem point for gm trucks. Great video!!!
@grominwithrob1339 Thank you! Good luck with your vehicle
@@KITS_Auto_and_Truck_Repair Oh oh, I was on my way home and thinking about what you had discussed in this video. Short term fuel trims were pretty good but long term wher 14 and 11. I gave it some gas and the long term fuel trims dropped quickly. As soon as I got to a stop light the long term fuel trims jumped. It seems I must have a vacuum leak. At least I have a direction I can look into my next day off. Looks like I am going to use a fluid transferring pump and a cigar and hopefully find my leak. Thank you so much for the video, it taught me a new trick and just may of helped me fix my truck. 🙏😂
Im a mechanic with 3 years experience and i learn alot from your videos it has helped me with my career, i look like the smart guy at work thanks to you.
@505fastlife6 My Pleasure! I'm so happy tto hear this! thanks for telling me how the videos have been helpful to you!
Great diagnostic of the fuel system on the Corolla..
@everrolmalcolm2933 Thank you!
Wow your friend is amazing, its not rare a machanic seeks machanism assistance to another machanic, its true when they say united we stand and divided we fall!!
@wsnxumalo6707 Yes! he has become a good friend!
Your skill is amazing sir!! Now I understand about the fuel trims.The way you explain things is like a professor. You need to open a school for to teach and share the knowledge you have my brother.❤
@fenwickchinkhwangwa3278 Thank you!
I work on Fords for almost 30yrs and ill say that ive never had a fuel pump cause lean codes.maybe im lucky but what it is.almost always a vacuum leak or a MAF sensor.very nice video
@rooster5755 Thank you!
When you run into this issue after you fixed the vacuum leak the catalyst can be plugged up in the exhaust also and that can cause the same symptoms as a low fuel pressure problem the car will start and idle fine but stumble and fall on its face when you try to accelerate you can easily check this with a simple vacuum gauge that also has a low fuel pressure gauge on it too when you rev the engine you will get a small increase in vacuum but then it will reverse and go towards a pressure on the intake this is the exhaust gases backing up inside the engine due to the pipes being plugged up at the catalytic converter Id definitely still check the fuel filter and fuel pressure and volume first though.
@Bill-wz6tw Good Point! I agree with you!
That's a good point, in the case where fuel trim is not giving direction. It's a blind spot for the PCM because exhaust pressure is not monitored (much like EGR problems). In this case, the clearly lean condition pointed elsewhere.
Excellent troubleshooter
@debtfreehouse6216 Thank you!
You are the best fault code reader,it is not easy to learn all the diagnosis functions..you are expert.
@sulltanarif1 Thank you!
learn something new today...great video!!
@feitankung Thank you!
I wish I saw your channel earlier. Anyways, I'm here and learning a lot from you. Thank you.
@medoveee7445 My Pleasure!
What a friendly and Knowledgable young man. 👍
@101thenuke Thank you!
Great video customer seems like a nice guy . Glad you helped him out 👊🏻
@sheerwillsurvival2064 Thank you!
Diagnose Dan and South Main Auto references in the same video. Good work!
@reubenmiller7988 Lol! Thanks
Your are doing a pretty good job. Thank you.
@terryowusu7930 My Pleasure! Thanks
First time visiting your channel. You hit some key components that I really like:
* You looked at FF data. This helps tremendously.
* You suggest OEM. Cannot tell you how many times I (and iatn members) have bashed my head against the wall on a problem due to aftermarket parts.
One thing that would be very nice, is to put down a final fix. Yes, your fuel delivery is low, and most likely a fuel pump, but until this repair is completed we do not know for sure. It's like me waving a magic chicken bone at a Cadillac w/ cam codes and say that it is a stretched timing chain.
Honestly, I thought for sure it was going to be defective injectors as this ( and MAF sensor) is the main cause of this code off idle.
@jimgeorge4677 This vehile was fixed after the fuel pump assembly was replaced!
I work as truck mechanic the same way my supervisor explain. F--k so simple and clear to diagnose. I m your subscriber now ❤. Great
@vikramvij1245 Thank you, Welcome to our youtube community!
Great job diagnosing the problem brother, u got a new subscriber
I'm also surprised that customer didn't complain about lack of power due to low pressure fuel because besides causing running issues I'm pretty sure that lack of power would be an issue as well
Great job brother 👌
@Joserocha-wm9de Thank you! welcome to our youtube community!
Great diagnosis! I read in other comments about how the brake affects the fuel trims.
@timd1833 Thank you!
Thank you for sharing your wisdom sebo..im a mecanic in making and i enjoy learning..cheers
@denisjazmanj8927 My Pleasure!!
Wonderfull diagnosis, you went straight to the problem. Thanks for sharing.
@mohabatkhanmalak1161 My Pleasure! Thanks
This is wonderful. I'm greatly impressed. Diagnosis made easy. I have a 2008 BMW 535i which I have been battling with lean code bank 2. Funny enough the LTFT is high both on banks 1 and 2. But it only reports code for bank 2. Fuel trim doesn't get better with increasing RPM. Fuel pressure on scan tool is normal at idle. What am I possibly dealing with. I have ruled out vacuum leak with a smoke machine. Your big fan from Nigeria
@chukachuka17 measure a fuel pressure with a pressure gauge and see what happens, if fuel pressure is good, then do the injector flow rate test!
This is really outstanding. Weldone Boss
@dreamlandmotors Thank you!
I follow you every day you make me understand so many things Boss
@user-dz4jb5rg6k I'm glad to hear that the videos have been helpful!
Very nice job. Very good explanation of what you were doing nd why. I'll be looking for more videos from you.😃
@d1bergman Thank you!
First time watching and subscribed, great video and explanation of diagnoses. Fantastic job
@josefachal1608 Thank you and welcome to our youtube community!
Nice diagnostic process , with logical approaches, I would like to see a fuel flow test (volume) during engine running openinig the fuel pressure gauge clear hose .
My friend did you know the ase patches on your shirt are on the wrong side? I say it because they are intended to show this while road testing a vehicle for example . Great job on the diag
@JoelAutomotiveInaction Oh Really? I didn't know that, Thanks
Fuel Volume Testing is Great , however ; absolutely unnecessary .
With Long Term Fuel Trims pegged @ 35 % - the Vehicles Computer is telling me that it had to Add 35 % of Fuel to bring the Vehicle back to 14.7 % Air & 1 % Fuel - I woulda connected a Fuel Pressure Gauge within 5 minutes after the Book told me the Fuel Pressure Specs. for this Vehicle or ANY vehicle.
Former Auto Smog Tech - Southern California ( ASE Certified then )
My Man with the Patches on the Port & Starboard Sides is Extremely Good.
Vietnam Era Veteran
Having + 35% means there is not the proper amount of fuel in the combustión chamber when he increases the rpm to 3,500 and I see those numbers I would have gone for maf sensoe not fuel , since from 600 RPM to 3,000 rpm you never change the Inyección pulse at all with no loads how the fuel pressure can afecct when you did not demand for Inyección pulse ?0@cbarkwell1000
Just came across your channel and checked out a video. Very informative and clear diagnosis. really liked it and looking forward to watching more !
@tomlombardo85 Thank you and welcome to our youtube community!
Good Diagnostic. I find the U.S. version of this Toyota usually has a seperate fuel filter ( in addition to the in tank filter on the pump ). The seperate filter is very poor quality and plugs up easily and may be why the pumps fail. Pretty common here. I replace the filter with a better non-toyota part. Of course new pump also....
Note: this version may not have the seperate filter.
@user-cp5vl9ot9x Thanks, Good suggestion, I agree with you
Thanks for sharing. I'm learning how to read graphs from you. I have a launch and a autel plus my blue driver. Thanks for your awesome expertise. Have a great day.
@bobbybenn8275 My Pleasure!
Don't assume the problem is the fuel pump it could be a pinched line or a plugged fuel filter or inlet screen also remember pumps don't create fuel pressure they only create flow pressure is created by a restriction in the system anywhere along the path of this flow changing the pump may fix it but you shouldn't be so fast to just jump to that conclusion
@Bill-wz6tw I hear you! but this car was fixed after the pump was replaced, I understand your logic!
Also power and ground, i always test with amp clamp and pico scope on the fuel pump fuse .
He lost pressure when the engine was off eliminating other possible causes.
He lost pressure when the engine was off!
Great lesson . It pays to be thorough in thw beginning . Some places also replace the fuel filter automatically . And the relay . They may tell the customer if the relay goes bad and you are stuck in a month , no warranty on the your old relay . Overkill but careful .
@billsmith2212 Thank you! Replacing the fuel fiilter would be a great idea but the relay you don't have to!
On these Corollas the fuel filter is part of the pump, there's no external filter to replace.
I agree . But when dealing with the public it can be interesting . " You fixed a flat tire a month ago and now my radio doesn't work ! " 😂
Great detailed diagnosis 👍
@on-site4094 Thank you!
Thanks bro ❤ I appreciate all
@user-bm8ek5jp9x My Pleasure!
Great diagnostic
Was it not possible to check fuel rail pressure without connecting manual gauge
Keep up the great work
@hasanyorgandji8317 Thank you! this fuel system doesn't have a fuel pressure sensor!
As usual my friend , highly appreciated , professional , fantastic explanation of the problems , respected man and very kind , thanks Deo , is it a correct name , greetings from Egypt .
@mohammadal-gebaly3046 Thank you my Friend from Egypt! Yes Deo is my name!
I had problems like this with my 04 mustang GT and I had to go to different mechanics one said that the engine was going bad and needed replacing so I told the 3rd mechanic to just replace the fuel pump and he did now the car good but I have evap codes I wish I could bring my car to you
@hermanrogers1325 Oh that's too bad! do you live close to Maryland?
Deo, you are a great diagnostician.
This industry doesn’t have many like you around here.
Where are you located?
Another great video!!!
@turbo8711 Thank you! I'm located in Dickerson MD
hello bro I have been in field 3 years ago after my associate degree in automotive but you're awesome man have your phone will be better better to reach you for more questions
@Evariste2 Sure! send me an email at kitsautoandtruckrepair@gmail.com so we can be in touch!!
Well I guess that means I have a fuel pressure issue.
Sit at 46% stfl 24% ltft at idle
and 36% stft 24% ltft at 3k rpm
Funny thing is I'm getting the best fuel economy I've ever had with this car, I use to get about 22 mpg per tank all highway, now I'm averaging about 28mpg per tank
Same p0171 code as well, spent the better part of the day looking at the scanner, checking for air leaks, spraying starter fluid everywhere, using pliers to block vacuum lines to look for any improvement as well, gotten no where at all.
@GainingDespair Test your fuel pressure and see what you got!
My 2002 Focus shows live data fuel pressure. No need to connect a gauge. Even basic scanners do.
@BigEightiesNewWave Nice!
Great video ! Im learning mechanics at the Alameda School in Oakland California...Ald guy (51 years old )starting a new career ..Could you explain why step on the brake change fuel trins values and the relationship with 02 sensor ? Im taking computerized engine controls classe and this looks a cool trick brot
@user-lb1zg7wb4f Thank you! when You pump the brake pedal while the engine is idling you create a lean condition on a vehicle that has a vacuum operated brake booster, because in the booster there is vacuum on one side and atmospheric pressure on the other, so pumping the brake pedal allows air to enter the vacuum chamber and create a lean condition, since the vacuum side is attached to the intake manifold, when this happens 02 sensors that are good react to the mixture change very fast, indicating good 02 sensors!!
How is the application of the braking system affecting the O2 sensor readings? Thank you
@richard1835 when You pump the brake pedal while the engine is idling you create a lean condition on a vehicle that has a vacuum operated brake booster, because in the booster there is vacuum on one side and atmospheric pressure on the other, so pumping the brake pedal allows air to enter the vacuum chamber and create a lean condition, since the vacuum side is attached to the intake manifold, when this happens 02 sensors that are good react to the mixture change very fast, indicating good 02 sensors!!
Did not know that. Have a Suburban here now with lean codes on both banks and an associated MAF code. Diagnosing today. You are awesome. Thank you@@KITS_Auto_and_Truck_Repair
Brooklyn in the house
@rrotwang Lol!!
Kit,s auto we are proud of u, thank you for your help all ways ,number 1,is your friend Habib auto from Ghana
@user-dl2ef8bw9f Thank you my Friend Habib From Ghana!
I'm also from Ghana can we be friends
@@adamissah452 of course my Brother from Ghana we can be Friends! Send me an email Please!
James from Kenya also a fellow mechanic in Kenya likes the video pretty much 👍👍
@jamesgichuhi2174 Thank you james from Kenya!
l really enjoy your videos.. thank you my engineer
@CharlesCharles575 My Pleasure!
God bless you and your family and friends
@user-dz4jb5rg6k Thank you!
Awesome diagnostic video my friend!
And i knew you meant air filter and not fuel filter 😅
@ysitrim88 Lol!! Thanks my Friend!
@@KITS_Auto_and_Truck_Repair
Your welcome
Thank you very much sir for teaching us
@ssentaayiakram2476 My PLeasure!
Good Morning , Love this video , May I ask where your shop is located ? I would like to bring my wife's Toyota to your shop please.
@55benchguy Good morning! Sure we are located in Dickerson MD, you can email me at kitsautoandtruckrepair@gmail.com for shop info and set up an appointment!
Often I do watch the video until the end I always advance more with fixing the problem
@jamesgichuhi2174 Great!!
Nice video Deo. Ara seems like a nice guy but honestly 2 shops couldn't attach a fuel gauge? This is driveability 101!
Did you give him a discount?
@NextLevelAutoDiagnostics Thanks Bro! Yes I gave him a Technician discount!
@@KITS_Auto_and_Truck_Repair 😊
Don't forget to replace the fuel filter as well
@jeffbecker9809 Yes! the fuel filter is part of the fuel pump assembly!
Deo is the man.
@neverstoplearning382 Thank you!
Was that MAF sensor also under reporting? Looks like it was under 2 GM/S at idle shouldn’t it be about 3.1 GM/S at idle?
@nickhyslop5743 No MAF Sensor was fine!
Ok my friend when there are fuel pressure most cars have problems to start immediately and the car was turning on right away I hope that you understand me Thanks
@nelsontorres2900 My Pleasure! did you ask a question?
Hi mi friend exellent diagnóstico thanks for sharing your knowledge blessinngs 👍👍👍👍👍👍👍👍
@renemata4350 Hello my Friend, Thank you!
Good case study! I noticed MAF only reporting 14.25 gm/s @ 4,185 rpm (12.59). Could the MAF also be underreporting?
Thank you for posting!
@spirokattan3655 My Pleasure! That MAF Sensor was updatingg pretty slowly, this car was fixed after the fuel pump assembly was replaced!
Cool! Thank you
PS: I checked my own car which is a 1.8 liter and sure enough the MAF values were the same as your car (in park).
Very good information and explanation..
@agoodneighborautorepair2176 Thank you!
Thanks for sharing your knowledge, God bless you
@haroldlarios5507 My Pleasure! Thanks
Very good diagnostic blessings brother
@user-em5mi3zo3c Thank you!
Well done! I never know how u guys read your tester. U know what buttons to click on to. I'm old school & this is all new to me. I hope to learn. I sub'd & gave u a 👍'd.
@riceburner4747 Thank you and welcome to our youtube community!
Waoo keep it
I have learnt alot
Iam also a mechanic
@blessevans6808 Thank you my friend!
Wow! OUTSTANDING Video!
I'm New to Your Channel.
Thank You for Your
Professionism.
Take Care and
Godspeed!
@Catayst-123 Thank you and welcome to our youtube community!
Good job bro I'm learning from you keep it bro God bless you
@adamissah452 Thank you!
You’re the BEST!!!
@andymasiddo8180 Thank you!
Thanks for sharing Deo. Good video.
@bartscave My Pleasure! Thanks
Nice work! Thanks for sharing
@Z14kt12timandjes1 My Pleasure! Thanks
Good teacher
@user-dz4jb5rg6k Thanks!
Well done genius
@Rekani-sq5nl Thank you!
U r good man
@jonathanfournier4084 Thank you!
One thing to all mechanics out there: you don't fix? I don't pay.
@jabjab12 Lol!!
How about when there is customer concern ? But the fault can not be duplicated, and the technician spent 1 hour? No payment for his efforts , time spent?
@@JoelAutomotiveInaction diagnosis and repair are separate actions
yes , I clearly understand that as well you , this meseege was for the viewers comment @jabjab12
This is a happy video.
@chekelley6861 Thank you!
Thank you for your reply, another very good video, keep it up
@dimisrambodimisrambo7285 My Pleasure! Thanks
Why did your A/F wideband sensor remain at near zero amps while the downstream Oxygen sensor accurately read a rich reading? The wideband A/F sensor should have read positive mAmps if in a lean condition but it did not. In fact, the wideband A/F sensor was fairly unresponsive. A bad fuel pump should have given a lean reading on the upstream A/F sensor (positive milliamps) if the fuel quantity was inadequate. I bet this vehicle comes back next week with the same complaint.
@fowvee No! you are wrong this vehicle is fixed and customer is happy after the fuel pump assembly was replaced, Some wideband sensor read reverse polarity, negative numbers don't always mean lean condition! Be careful my friend!!
@@KITS_Auto_and_Truck_Repair Thanks for the reply. With wideband sensors a lean condition will actually give a postive milliamp reading. But, if you say it's fixed then you would know best. Thanks again.
Hi my friend I got a question why if there are fuel issues the car turn on right away
@nelsontorres2900 did you mean the car doesn't turn on right away!
Awesome! I hope you can help me. My mechanics in New Jersey can't explain why my car has a lean condition. I've even taken my car to the Nissan dealership, and they couldn't help me. I emailed you some hours ago today. I hope I can reach you. Please help me.
@seanspeller3542 Thank you! I will reply to your email!
Let everyone know the result of your diagnosis please.😊
@@user-ud9ow5yi7n The vehicle was fixed after the fuel pump assembly was replaced!
AWESOME VIDEO , SUBSCRIBED ,
@silkylove1000 Thank you and welcome to our youtube community!
@@KITS_Auto_and_Truck_Repair YOU'RE WELCOME ,
good video my friend
@humbertoarellano8887 Thank you!
exselente dianostic master mi respecto para uste saludes noel matute
@MechanicTechnicianRepair Thank you!
I like your content bro
@ERICAUTOCENTER Thank you Bro!!
@@KITS_Auto_and_Truck_Repair you are doing a great job I have been watching your videos a lot for a very long time a truly fun of you and hopefully to collaborate with you in the future. I really need your email if you won’t mind. Thank you
I notice that at 3500 rpm the afr sensor doesn't see the mixture or am I doing something wrong? I mean it doesn't go rich like the rear 02 sensor....while when you press the brake it goes to lean, so he didn't see the mixture from the bad fuel pressure?
@dimisrambodimisrambo7285 The 02 sensor were a bit slow in reporting the oxygen content in the exhaust stream, they weren't warn enough!
Thanks for sharing 😅
@jameswhite1319 My Pleasure!
Where is your shop.
You mentioned German Town there is a German Town in the state where I live. I’m in Pennsylvania. What state are you in?
@odolphecesar7744 we are loacted in Dickerson Maryland!
Great job thank u!!
@achap9644 M y Pleasure! Thanks
Why is Kit SOOOO much taller than Ari 🤣🤣🤣
@82_KID Lol!!
I have 1996 Astro van with -17 lean condition no codes other then misfires when driven not idle I've done all I can will not correct help any ideas
@eddiecortez8320 what have you done so far?
New fuel filter and pump new spider full tune up no codes unless driven p0300
I won't bring Camry down there. Where is your shop located. Thank you.
@terryowusu7930 My Pleasure! I'm located in Dickerson MD, you can email me at kitsautoandtruckrepair@gmail.com for shop info!
About the only thing that goes wrong on a Corolla.The fuel pump.
@richardcoutts2198 Yes!!
That mean the pump is not good is jatta Victor
@user-dz4jb5rg6k Lol!
Thanks!
@ysitrim88 My Pleasure! Thanks for donating to the channel!
@@KITS_Auto_and_Truck_Repair
Np my friend.
Did you replace the fuel filter to eliminate a blockage
@randyhughes5160 The filter in the fuel tank was replaced with the new fuel sending unit! the filter was ok, the pump was the problem!
Nice video Deo, How to work with you? My company want to ship a scan tool to you.
@eriksony6398 Thank you! you can get in contact with me via email at kitsautoandtruckrepair@gmail.com, I'm open to check it out and see if it's good!
@@KITS_Auto_and_Truck_Repair Thanks, Just sent
What scanner you are using?
@dicksonrodriguez2238 I used my snapon zeus scanner in this video!
Hi ❤ india helfull bro
@vipinvipin3075 Thanks!
Please do you live in Maryland?
@kingsleyjohnson4055 Yes I do! we are located in Dickerson MD, you can email me at kitsautoandtruckrepair@gmail.com for shop info and set up an appointment!