I need diagnostic help
Thread Starter
Teching In
Joined: Aug 2003
Posts: 13
Likes: 0
From: USA
I need diagnostic help 
I have a 2000 TA WS6. My check engine lamp is on. I have two codes P0171(fuel trim system lean,bank 1) andP0174(fuel trim system lean,bank 2). I have a tech2 scan tool,but don't see anything wrong with sensor values(that I know of). Anybody a tech out there that knows what's going on that can help me. Thanks alot.........
Thread Starter
Teching In
Joined: Aug 2003
Posts: 13
Likes: 0
From: USA
Re: I need diagnostic help No I haven't. I've seen what seems like a lot of people talking about defective MAFs and these codes but it seems to me it should be further down the line, like an O2 sensor or something......
Re: I need diagnostic help since both are showing lean conditions, i find it hard to believe they bolh died at the same time.
Something that effects what goes into the motor, would be more likely to give a low output for both sides.
low fuel pressure, clogged filter, or dying pump could cause this problem. There are a few other things too, but im not sure off the top of my head.
Just my $.02.
Ryan.
Something that effects what goes into the motor, would be more likely to give a low output for both sides.
low fuel pressure, clogged filter, or dying pump could cause this problem. There are a few other things too, but im not sure off the top of my head.
Just my $.02.
Ryan.
