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03-18-2005, 08:01 PM | #1 |
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P0174,P0171 Codes...
I have been getting codes for lean condition on both banks. The codes are triggered by long term fuel trims of over 20%.
After I put the supercharger on, my car ran great for a long time and it still does. I guess it was about 6-8 months after adding the charger that I started getting the P codes for lean condition on both banks. The PGM I borrow from work shows a snapshot, it looks nearly identical everytime....same speed, tps, rpm, etc. The conditions I remember off the top of my head are 1800rpm, 50-something mph, 5th gear. I forget the load, TPS, etc but they all seem normal. By definition of the codes, my long term fuel trims are over 20%. I believe it happens in the contructions zones of I20, the only place I'd be going 50mph(my speedo is off so its actually 58mph) I originally thought it was related to an exhaust leak on the driver side. But I fixed my exhaust leak, then got the code again, this time for both banks. I have tried different O2 sensors with no luck. I also tried disconnecting my Air/fuel gage to make sure it wasn't creating an error in the O2 signal. Even if it had been it would onyl affect one bank anyway. I guess the only other thing that may have changed is MAF position. I guess its possible that at that specific RPM/airflow the MAF gets confused. I'm planning to get the car tuned soon hopefully and I want to clear up any items that might screw up the tunability. Any ideas?
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2001 Cobra 'Vert Procharged and Intercooled 455rwhp/441rwtq Work Car: 2005 Honda Odyssey 400 whp Turbo V6, 6-speed, full cage, H&R Suspension, Brembo Brakes |
03-18-2005, 08:22 PM | #2 |
ooooo cake!!!
Join Date: Dec 2004
Location: Saks, AL
Posts: 1,630
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Re: P0174,P0171 Codes...
sounds like a vacuum leak to me
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03-19-2005, 04:30 PM | #3 | |
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Re: P0174,P0171 Codes...
Quote:
Interceptor, I have tried many changes and have disconnected the battery(usually overnight) everytime to reset the Keep Alive memory. Still keeps coming back.
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2001 Cobra 'Vert Procharged and Intercooled 455rwhp/441rwtq Work Car: 2005 Honda Odyssey 400 whp Turbo V6, 6-speed, full cage, H&R Suspension, Brembo Brakes |
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03-19-2005, 01:32 PM | #4 |
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Join Date: Mar 2005
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Re: P0174,P0171 Codes...
before you rack your brain and all that have you tried the simplest thing and unplugged your battery for a bit? After you did some stuff it might not have reset the computer and cleared the code. Just a suggestion before you really start diving in. I've seen it clear up several times before. Of course I could be wrong.
EDIT: Not saying this will absolutely fix your problem. Just might be worth trying before you really dive into trouble shooting. |
03-20-2005, 02:07 PM | #5 |
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Re: P0174,P0171 Codes...
I checked the vacuum line to my boost gage and the vacuum line to my bypass valve and neither is leaking.
I think the only other thing is the idle air bypass, I may have taken that off once before. I will check it with some smoke to see if it leaks.
__________________
2001 Cobra 'Vert Procharged and Intercooled 455rwhp/441rwtq Work Car: 2005 Honda Odyssey 400 whp Turbo V6, 6-speed, full cage, H&R Suspension, Brembo Brakes |
03-20-2005, 02:43 PM | #6 |
Comfortably NUMB
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Re: P0174,P0171 Codes...
speaking of codes.........
I pulled mine yesterday and returned 4 186-MAF injector pulsewidth voltage too low 157-MAF sensor voltage too low could these be caused by the C&L? The other 2 have been corrected.
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'02 GT....just another money pit. |
04-07-2005, 05:30 PM | #7 | |
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Re: P0174,P0171 Codes...
Quote:
Only other thing that has changed along the way is the MAF position. I think this is the next place I will look.
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2001 Cobra 'Vert Procharged and Intercooled 455rwhp/441rwtq Work Car: 2005 Honda Odyssey 400 whp Turbo V6, 6-speed, full cage, H&R Suspension, Brembo Brakes |
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03-20-2005, 07:44 PM | #8 |
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Re: P0174,P0171 Codes...
Dirty MAF element?
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2001 Cobra 'Vert Procharged and Intercooled 455rwhp/441rwtq Work Car: 2005 Honda Odyssey 400 whp Turbo V6, 6-speed, full cage, H&R Suspension, Brembo Brakes |
04-08-2005, 06:31 AM | #9 |
ooooo cake!!!
Join Date: Dec 2004
Location: Saks, AL
Posts: 1,630
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Re: P0174,P0171 Codes...
Hey Brad did you ever hook up the extender? Do you think you're still pegging the maf?
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04-08-2005, 10:26 PM | #10 | |
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Re: P0174,P0171 Codes...
Quote:
The problem is not related to peggging maf as it occurs at low rpm, low load, cruising. 86GT, I agree about the exhaust leak/both banks not being the problem. I am thinking the MAF is a possibility. I can look at the EGR, but I have never messed with it on this car.
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2001 Cobra 'Vert Procharged and Intercooled 455rwhp/441rwtq Work Car: 2005 Honda Odyssey 400 whp Turbo V6, 6-speed, full cage, H&R Suspension, Brembo Brakes |
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