P0171 CODE ( Fuel Trim System Lean Bank 1-B) Help!!!!!!
Thread Starter
Pro
Joined: May 2002
Posts: 523
Likes: 8
From: Nashville TN
P0171 CODE ( Fuel Trim System Lean Bank 1-B) Help!!!!!!
Anybody out there have this code before? (P0171) Fuel Trim System Lean Bank 1-B). What should i chek first? Injectors, spark plugs, MAF, vacuum? I know i am running on seven cylinders. Please chime in if you come across this code. Thanks :confused:
[Modified by TNTC5, 1:36 PM 11/2/2003]
[Modified by TNTC5, 1:36 PM 11/2/2003]
Drifting
Joined: May 2002
Posts: 1,607
Likes: 1
From: San Francisco CA
Re: P0171 CODE ( Fuel Trim System Lean Bank 1-B) Help!!!!!! (TNTC5)
If you are not getting the P0174 code then you can rule out a vacuum leak, as it would cause both banks to run lean. Likewise as far as trouble with the MAF.
A scan tool would be the best way to track down the problem but without one your best bet is to pull the plugs on the driver side. The plugs should have a light tan/grey color but if you have a bad injector that is flowing too little fuel then the plug should be whiter in color.
You might want to pull a passenger side plug for comparison if you have no bank 2 codes to have the best idea of what the plugs should look like.
A scan tool would be the best way to track down the problem but without one your best bet is to pull the plugs on the driver side. The plugs should have a light tan/grey color but if you have a bad injector that is flowing too little fuel then the plug should be whiter in color.
You might want to pull a passenger side plug for comparison if you have no bank 2 codes to have the best idea of what the plugs should look like.
Le Mans Master
Joined: Jul 2002
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From: Slave to the evil empire
Cruise-In V Veteran
St. Jude Donor '04
Re: P0171 CODE ( Fuel Trim System Lean Bank 1-B) Help!!!!!! (TNTC5)
I know i am running on seven cylinders.
If you are misifring on 1 cylinder that will cause the o2 sensors on that bank to read rich.
Thread Starter
Pro
Joined: May 2002
Posts: 523
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From: Nashville TN
Re: P0171 CODE (runamuk)
Thanks guys, P0171 that was the only code that current and the rest were history. I haven't look at the car yet because i have to work. I am going to check it out with the Tech2 tonight and i will post to solve future problem. Thanks again.
