Need SES help!
Thread Starter
Teching In
Joined: Aug 2002
Posts: 9
Likes: 0
From: tucson, AZ
Need SES help! Hi, I'm new to the board. Here's my problem. I drove my Trans Am from San Jose, CA to Tucson, AZ where I'm going to school. After getting settled i and driving aroudn the car, it was fine the first couple days, then on the 3rd day it started idling really low, like at 500. So I reset the PCM and it seemed to correct the problem, but then the SES light went off. I went to Autozone cuz they scan your diagnostic computer for free. It said P0174 which means Fuel Trim System Lean Bank 2. He said I might have picked up something from one of the gast stops along the desert highway and that a fuel injector might be clogged. So I bought some fuel injector cleaner and put it in a full tank. So far I've used about 1/4 a tank of gas and the light is still on. I'm still under warranty so should I take it in or wait till I use the entire tank. Any other suggestions appreciated!
Staging Lane
Joined: Aug 2002
Posts: 53
Likes: 1
From: Florida
Re: Need SES help! P0174 Fuel Trim System Lean Bank 2 - here's some possibilities:
*This DTC sets if the engine runs out of fuel.
*A fuel delivery malfunction causes this DTC to set.
*If DTC 171 is also set indicates both banks of the engine are operating lean. Inspect items that would cause both banks to operate lean.
*A vacuum leak will cause DTCs P0171 and P0174 to set at the same time. Inspect all areas of the engine for a vacuum leak. Also inspect PCV valve for being the correct one for this application. Make sure the engine oil fill cap is in place and that it is tight. Inspect that the engine oil dip stick is fully seated.
*This DTC sets if the engine runs out of fuel.
*A fuel delivery malfunction causes this DTC to set.
*If DTC 171 is also set indicates both banks of the engine are operating lean. Inspect items that would cause both banks to operate lean.
*A vacuum leak will cause DTCs P0171 and P0174 to set at the same time. Inspect all areas of the engine for a vacuum leak. Also inspect PCV valve for being the correct one for this application. Make sure the engine oil fill cap is in place and that it is tight. Inspect that the engine oil dip stick is fully seated.
