Fuel Trim System Problems
Thread Starter
Instructor
Joined: Oct 2001
Posts: 152
Likes: 0
From: Walnut Creek CA
Fuel Trim System Problems
OK, I need help with the codes I am getting of the DIC. I just had clutch and tranny work done, and now that I have the car back, I got the engine light on the display. I pulled the codes and got the following:
10 PCM
P0171 (Current & History) = Fuel Trim System Lean Bank 1 B
and
P0174 (Current & History) = FUel Trim System Lean Bank 1 B
What does that mean? I thought the Oxygen sensor might not have been plugged back in, but that does not seem to be the case. Has anyone else had this problem and got it fixed?
BTW, it is a 99 coupe with no mods other than the new clutch and a K&N filter.
10 PCM
P0171 (Current & History) = Fuel Trim System Lean Bank 1 B
and
P0174 (Current & History) = FUel Trim System Lean Bank 1 B
What does that mean? I thought the Oxygen sensor might not have been plugged back in, but that does not seem to be the case. Has anyone else had this problem and got it fixed?
BTW, it is a 99 coupe with no mods other than the new clutch and a K&N filter.
Melting Slicks
Joined: Mar 2003
Posts: 2,744
Likes: 9
From: FL
Cruise-In VI Veteran
It is very possible that you have a damaged O2.. from when they removed the midpipe to work on the clutch. Might have been hit hard or something. It also is possible that something didn't get sealed right causing an exhaust leak (which in turn causes a "false" lean condition)
Steve
Steve
