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Causes and Fixes Honda P0171: Bank 1 System Too Lean 

HVAC Mechanic
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Overview of the causes and fixes of a Honda with a P0171 error code.
Read here for more information: www.backyardmechanic.org/caus...

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8 июл 2024

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Комментарии : 19   
@ciaracooper1471
@ciaracooper1471 3 месяца назад
Thank you for being straight to the point you helped with all the possibilities of what my problem can be and I appreciate that!
@saunderslashawn2
@saunderslashawn2 6 месяцев назад
I have a 2000 honda accord and it periodically cranks and rpm goes to 0 my d4 light blinks and it sometimes it shifts automatically sometimes i have to manually put in 2 first to drive it I saw a video that said the lock up solenoid does this your opinion please thanks
@monkey875
@monkey875 3 месяца назад
The purge valve stock open can coast a vacuum leak, and that caused many problems even a po171.
@yessir209er
@yessir209er 6 месяцев назад
Awesome video
@backtothefuture1111
@backtothefuture1111 4 месяца назад
Thank you, 🙏🏼 I have a 99 Accord that’s running lean that I’m currently troubleshooting so this is helpful. I changed one of the hoses yesterday…still misfiring…today I changed the MAP sensor…definitely feel a difference but still misfiring and so my next course of action is the once again check all the other hoses as well as the O2 sensor…fingers crossed 🤞🏼
@papo862
@papo862 2 месяца назад
Did you figure it out?
@yessir209er
@yessir209er 6 месяцев назад
Thank you sir
@bridgettefolkes9350
@bridgettefolkes9350 6 месяцев назад
I have an 08 Honda Accord and since it's starter was changed it has a check engine light on. I've changed the 4 spark plugs, the mass air flow sensor, the intake hose, the air filter, the coils, and gas treatment. Now the check engine light is flashing and the car looses power when acceleration is attempted. The computer says the bank 1,2 are misfiring what more can i do since none of the previously recommended fixes worked. Car has 101+ miles on it. Thanks for a response
@HVAC_Mechanic
@HVAC_Mechanic 6 месяцев назад
I would check for a bad injector on cylinders 1 and 2 and for low fuel pressure.
@postman2.091
@postman2.091 3 месяца назад
Hi, my Accord Petrol 2.0 Gen 7, throws the error on motorway whilst cruising around 3000 revs. for 1/2 hour. Disconnecting the battery clears the fault until the next motorway trip. I changed plugs, & air filter, (can't find a MAF) by the air filter, I checked for vacuum leaks. Any idea what might causes the problem? Any help greatly appreciated.
@HVAC_Mechanic
@HVAC_Mechanic 3 месяца назад
Lean codes can be hard to troubleshoot since many things can cause them. If there is an inline fuel filter I would replace it, and I would also test the coil and fuel pump, as they may be weak and starting to fail.
@jersey123rich
@jersey123rich Год назад
Got this code but the trouble for me really is that the car, once hot, becomes no crank, no start until the car cools down? No other code shows up and no check engine light came on. I changed the two pgm relays behind the kick panel. I'm considering the ECT, because I heard that it reports to the computer that the air fuel ratio is cool, so the computer increases it thinking the engine is cold, and this causes a conflict leading to no crank, no start? Another possibility is the fuel pump & filter. This car has 290K miles on it so I'm sure it's very possibly a bad fuel pump. When the car starts the rpms sometimes drop quickly to 600 rpms. So, might you have any other suggestions? Which route should I try first, ECT or Fuel pump? This is an 07 Accord with a 2.4L, are there 2 ECTs or just the one at the bottom of the radiator? Thanks for any advice!
@HVAC_Mechanic
@HVAC_Mechanic Год назад
Since it only happens when the car warms up and is hot it might be a sensor starting to fail. Is there spark when it get hot?
@Delight.AutoCRAFT
@Delight.AutoCRAFT Год назад
You have a bad fuel pump that's fails when hot
@rickortiz654
@rickortiz654 Год назад
My check engine light comes on & I'll get this code when idled for an extended amount of time. Engine light turns off a day or so later under normal driving conditions.
@paulmbonika2459
@paulmbonika2459 7 месяцев назад
Same as mine. Did you get to find what was the problem?
@rickortiz654
@rickortiz654 7 месяцев назад
@@paulmbonika2459 No. I just live with it.
@justinn71
@justinn71 6 месяцев назад
does it change with fuel level? mine trips only below 1/4 tank, EVAP issue.
@rickortiz654
@rickortiz654 6 месяцев назад
@@justinn71 I've never noticed. I'll check my fuel level next time it comes on. I'll let you know.
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