HONDA CIVIC CODE P0171 & P0138: FUEL SYSTEM TOO LEAN & 02 SENSOR HIGH VOLTAGE: DIAGNOSIS & REPAIR
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- Опубликовано: 25 авг 2024
- In this video I will share with you how to diagnose and fix a P0171 & P0138 Trouble Code On a Honda Civic! #CodeP0171 #Checkengine #Fuelsystem
Sir, you are a master mechanic! And based on your videos you don’t replace unnecessary items. I notice you meticulously tested each component including a scope on sensor wires! I personally learned a lot watching you troubleshooting! Thank you! 👍
@AndreSilva-gm4lt My Pleasure! Thanks, I'm glad to hear that the videos have been helpful!
I HAVE A 2013 CIVIC . MY CAR DID THE SAME EXACT THING. NO ENGINE LIGHT CAME ON. I CHANGED MY MAF SENSOR AND THE UPPER OXYGEN SENSOR. THE POWER TO THE ENGINE RETURNED. GAS MILEAGE IMPROVED. SMOOTH IDLE. CLEARED THE CODES. EVERYTHING BACK TO NORMAL.
@henrystyle4879 That's Good!
That is the first thing that comes to mind when I get a lean code condition. Vacuum leak. Plastic induction system and poor maintenance equal lean codes. Learning how to trouble shoot lean codes is great with your video. Great presentation. I hope you get more subscribers because you are an asset to people learning the Automotive Repair trade.
Richard 1 Thank you!!
Hey brother, it’s Tom Mack. I I followed your advice get to the root problem and it turns out it was the fuel pump I paid $283 bucks !! At O’Reillys or a Silverado 1500 I got a fuel pump at Amazon $88 bucks , so far so good , I don’t care what these other mechanic tell me I guess they wanted to be like what you said don’t be one of those guys that buy brand new parts you don’t need , god bless you my brother thanks so much
Tom Mack My Pleasure!! I'm glad to hear that your car is fixed!! thanks for letting me know!
You are welcome, I should be the one Thanking you bro, I don’t know why but other mechanic must have stock in auto parts ? Giving the wrong advice. It’s like why? I don’t mind getting a new part of my truck 🛻 but when they cost 💲a arm and a leg I don’t I have better things to do with that money like pay off a bill. You are a blessing to the people and to RUclips . I know there’s others here but !!! You have been more help to me then all the other on here ! I don’t mean to be saying anything bad about them other’s, you at least get back to me with your advice, I don’t get any feedback from any of these mechanics at all, I am a Christian and I do believe in God and I will be praying for you to be blessed , I am 60 now I I grew up working on the 50s 60s and 70s vehicle when they were simple to fix but this new vehicle, I hate I have leaned more from you then I have from all there other on here . Thanks again, Have a great day bro 😎
Thanks bro you giving me the confidence to approach under the bonet . Any advice for a budget scan tool for beginners . appreciate .
YOU AS ALWAYS ARE NUMBBER 1, THANKS
@sambitar5194 My Pleasure! Thanks
Really good information on graphing O2 sensors. Thank you K
Richard 1 My Pleasure!!
Excellent diagnosis your videos are making me much better. Thanks you very much for your videos. 👍🏾
samuel adams My Pleasure! I'm glad to hear that the videos have been helpful!
shout out sir from the phillippines
el fernandez Thank you! and thanks for letting me know where you are watching from!!
Deo, I hate to tell you this, "now they are recommending MAF sensor cleaner or electronic cleaner on this sensor. They don't even want you to use brake cleaner on throttle housing. The recommendation on throttle housing cleaner is now Sea foam or throttle housing cleaner.
Melanie Branton D.V.M. yeah, you are right I should have used a MAF Cleaner, I used what I had Lol! next time I'll make sure I get the right stuff!
I love your explanation for learn and reach conditions numbers, K DIAGNOSTIC you are too much
Suleman Habib My Pleasure!! I appreciate it!
It was an awesome approch to tackle a defective component but my question here is that from one of your videos you give an idea that each time you replace oxygen sensor you have to learn it so that it will last longer thank you!
Aminu Abdulqadir Abubakar My Pleasure!!
That is odd not having the C.E.L. on but I have seen that before with both pending and hard codes. I guess it takes awhile for the ECM to wake up and say "Hey we got a problem here" . The key is, we need to communicate with the modules successfully to diagnose the vehicle properly. Thank you K . Appreciate your hard work in bringing us this content.
My Pleasure!! It was odd that the C.E.L was not staying on!!
@@KITS_Auto_and_Truck_Repair You know some computers get stupid. It is like, you produced the codes which is good, Maybe the light bulb is out in the display? Had a customer have me fix the A/C on there Patriot and then brought me a MAZDA that was TurboCharged and had oil all in the induction system. Number 3 cylinder misfire. Asked me what I thought about it and I did not tell him what I was thinking. He did not want to pay me to diagnose further and repair the vehicle. Poor engine had to endure a rough ending because of a lack of maintenance. Take Care
@@richard1835 oh Really??
@@KITS_Auto_and_Truck_Repair Your Instrument Cluster may have a bad LED bulb in the C.E.L. position. Yes he wanted me to diagnose the vehicle for free. I do not perform Free Diagnostics.
@@richard1835 I agree! no free diagnostics, make sure you charge for your time!
I love your work! Always very informative!
Ladeisha Williams Thank you!!
Your video makes common sense. Keep it up
Mayowa Odus Thank you!!
informative. thanks for sharing. Looks like that booth cracked prematurely... I mean is a 2015 only 7years; this is part that does not move ...
Daniel Builes Thanks!
In your case, ASE stands for Awesome, Super, Excellent mechanic!!!
Melanie Branton D.V.M. Thank you, I appreciate you!
Wow those are crazy Fuel Trim numbers. I am surprised the system is remaining in Closed Loop.
Richard 1 yeah!! The trim numbers were crazy high!!
Very nice video with very nicely explain.Thank you.
kd1366 My Pleasure!!
Does the rule of high RPM returning fuel trims to normal in the case of vacuum leak also apply to turbo powered engines?
@chukachuka17 not necessarily!
Another great video by K Diagnostics
Richard 1 Thank you my friend!! How's the chevy project going? did you get it done?
@@KITS_Auto_and_Truck_Repair Well, I found the wires ripped out of the OBD Plug and inquired about that. This customer is strange in the least and I decided not to work on his vehicle. I have a 2013 Audi A6 with an intermittent compressor engagement issue I am working on now. My scan tool showed a malfunctioning pressure sensor and a network issue. I am working on that today. Have been busy with a lot of A/C work being that I specialize in that field. Hope all is well with you and your family. Take Care
@@richard1835 Everything is going well! Good luck with the AC job!!
Very good diagnosis again! Good video.
Bart Young Thank you!!
Nice
@user-dz4jb5rg6k Thank you!
excellent job very informative
gilberto cruz Thank you!
Hi. Can you explain why did you changed the second o2 sensor after you found the air leak? O2 b1bs2 after replacing is still not right as he is oscilating. There should be the almost the flat line in range 0.45 to 0.7v with tendention to rich side if cat is good. Will look for exhaust leaks or bad catalyst after good heatup
Mr. T 02 sensor was replaced because of how slow it was responding! no exhaust leaks were found, an 02 sensor after the cat can oscillate momentarily which is ok, but not just all the time!
Is there any way to diagnose if its the fuel pump or maf sensor/vac. Leak without that computer all I have is a regular obdll which I use just to get codes
@vatoloco1348 you can look at Data Pids and figure it out!
@KITS_Auto_and_Truck_Repair ok so I found out my obd11 did have a live data option shrtft1 is 43-44% longft is 25-26% while idling at 680rpm I've cleaned my maf sensor and there appears to be no leaks I'm running a code p0171 right now and can't figure it out any recommendations would be greatly appreciated 😅
Great video and explanation. The bank 1 sensor 2 after being replaced was still switching like an upstream sensor .I thought the bank 2 sensor should be more of a flat line? Thanks for sharing.
martinguitarhd28 My Pleasure!! The cat is starting to deteriorate on this vehicle!!
@@KITS_Auto_and_Truck_Repair thought that might be the case.thanks for sharing. Always like your explanations.
@@martinguitarhd28 My Pleasure!!
2015 Honda Civic 1.8 the hose leading to the throttle body and mass air sensor it was ripped well the air filter look like it wasn't changed much so that means that area wasn't moved a lot so how did that get ripped
brenda palen overtime with the heat in the engine bay the hose cracks and eventually it breaks!
A bit confused. Since the cause of the P0171 is a vacuum leak, why didn't the high RPM revert the fuel trims to normal?
@chukachuka17 what do you mean?
@@KITS_Auto_and_Truck_Repair you mentioned that with a vacuum leak, revving the RPM will usually correct the fuel trims with -10 to +10%. However, that wasn't the case here even with that vacuum leak.
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@phamuchuynguyen7921 Thank you!
Any Air after the MAF will definitely affect fuel trims. So you can use brake cleaner to clean a MAF? I usually use the Mass Air Flow cleaner. Brake cleaner would be less expensive of course. Thank you K
Richard 1 My Pleasure!! Brake clean does the job!! Lol!!
DEO MY BROSKY THANKS FOR SHARING 🦀🦀✌️
Joseph Bonilla My Pleasure Bro!!
Thanks a lot , good gob
Mohammad Al-Gebaly My Pleasure!! Thank you!
Good work
William Herrera Thank you!
Nice vedio boss
Ashif Mohammed Thank you!
SORRY FRIEND BUT O2 SENSOR 2 IS STILL GOING UP AND DOWN COULD YOU HAVE A BAD CATALYST? I AM DIMIS FROM GREECE HOW ARE YOU?WE HAVE NOT TALKED FOR A LONG TIME.......
LETTA LETTA I'm good my Friend! How are you? the Cat and the 02 sensor needed to warm up a little bit!
I ask you to activate the translation feature in the video to all the languages of the world 🌏
Ghaith Sabah Done !
I had the same problem with my civic. That original Honda air inlet tube is made from recycled materials to be “GREEN “ and tears apart every fee years to reminder the owner to be cool green. 😏😏
Hojat Mahdavi haha!
Grasias
Martin Arrieta My Pleasure!!
If the short term fuel trim was negative 30% what can we attribute that too
Mayowa Odus a stuck open fuel injector can cause that and etc...
I have the same exact car and engine. Currently dealing with weird idle. My car shakes/shuddering (noticeable enough) but no check engine light. Did a tune up recently with new spark plugs and all about less than a year ago. I also replaced the intake boot that you replaced and cleaned all my throttle body plate and MAF sensor with cleaner and a new air filter and freshly new changed oil.
I looked at the fuel trims with my scanner and my short term fuel trim bank 1 is 2.3 - 3.1(%) and my long term fuel trim bank 1 is -2.3 (%) to -3.1(%). Long term is on the negative side… Would that be pointing to a bad O2 sensor you just replaced? Also my engine coolant temp is about 203F warmed and after driving for a good 20minutes. Not sure if my numbers on my car are normal? Any input would be appreciated. Thanks
Forgot to mention, i cleaned my egr valve also. My scanner also shows EGR error 99.2(%) to 0 (%) every 3 seconds… would that also be an indication of a malfunctioning egr valve?
Jomari Torres Your fuel trim numbers don't look bad at all!! did you get these numbers at idle or at high rpm? the next thing you can check is your crank and cam sensors, I'm not saying replace them but check them, if you don't have the scope to check them, you should have a pro mechanic do that for you!! so you can get to the bottom of the problem!
Jomari Torres yeah! your EGR valve might be opening at the wrong time!! but usually ego opening at the wrong time would cause your trim numbers to be high positive!!
@@KITS_Auto_and_Truck_Repair Got a check engine life for crankshaft position sensor 2 months ago and replaced it. Havent had any check engine after that and its been clear since then. The car was idle when i checked the numbers. What do you think of my egr error reading? Is that normal also? Thanks
@@KITS_Auto_and_Truck_Repair would you also know where the camshaft sensor located for this engine?
Hello
@IsaacMireku-wd7nv Hello!
👍👍🌷🌷🌷
Aymen Mohamed Thank you!
idol.....
大黄蜂 Bumblebee Thanks!!
Not the first comment
TheRealDyscyples Thanks for being here!
Break clean is not good to clean maf senor
Franklyn Flowers Lol!! I does the job sometimes!
Needs oil change after this job
E.R.videography Yeah! doing an oil change afterwards would be a smart move!
@@KITS_Auto_and_Truck_Repair 👍🏽
@@e.r.videography6209 good!
Lazy O2. Thats hilarious 😂
Gail M Lol!!
That is the first thing that comes to mind when I get a lean code condition. Vacuum leak. Plastic induction system and poor maintenance equal lean codes. Learning how to trouble shoot lean codes is great with your video. Great presentation. I hope you get more subscribers because you are an asset to people learning the Automotive Repair trade.
Richard 1 Thank you!! I'm sure the channel will get big!! with your help and everyone else's help the channel will reach many people!!
@@KITS_Auto_and_Truck_RepairKeep up the great content. Thank you
@@richard1835 My Pleasure!!