Check Engine Light questions
09-27-2007, 03:20 PM
#1
On The Tree
Thread Starter
Join Date: Jun 2005
Location: Bellevue, WA
Posts: 113
Likes: 0
Received 0 Likes
on
0 Posts
Check Engine Light questions Ever since my track day 1.5 wks ago I've had a recurring CEL. I just assumed it had something to do with oxygen sensors. Car seemed to fun just fine. Well, I finally got off my lazy bum and hooked up my code reader. It kinda surprised me:
P0171 - System too Lean (Bank 1)
P0332 - Knock Sensor 2 Circuit Low Input (Bank 2)
Does anyone know what this could be? Simple fix or dealership visit?
Thanks!
BTW, I've NEVER heard any knocking at all.
P0171 - System too Lean (Bank 1)
P0332 - Knock Sensor 2 Circuit Low Input (Bank 2)
Does anyone know what this could be? Simple fix or dealership visit?
Thanks!
BTW, I've NEVER heard any knocking at all.
09-27-2007, 06:44 PM
#3
On The Tree
iTrader: (5)
Join Date: Nov 2005
Location: Portland OR
Posts: 165
Likes: 0
Received 0 Likes
on
0 Posts
Knock Sensor retards engine timing and fuel trim I believe. Not sure they are related tho, seems it could be, but I would think the Bank 2 sensor would affect Bank 2, not Bank 1.
There are a few TSBs out for the P0171 System Too Lean, mostly to do with plugged injectors etc, I did a fast search and didn't see any that tied the two together.
But I am FAR from being a Tech.
I am sure one of the more knowledgeable guys will pipe up soon and give you a run down.
There are a few TSBs out for the P0171 System Too Lean, mostly to do with plugged injectors etc, I did a fast search and didn't see any that tied the two together.
But I am FAR from being a Tech.
I am sure one of the more knowledgeable guys will pipe up soon and give you a run down.
09-28-2007, 01:35 AM
#5
TECH Enthusiast
iTrader: (1)
Join Date: Feb 2005
Location: Kent, WA
Posts: 747
Likes: 0
Received 0 Likes
on
0 Posts
+1 on checking the gaskets. I had the Knock Sensor code and it turned out to be oil getting into the sensor because the gasket was leaking. Fixed under warranty no problem.
09-28-2007, 01:33 PM
#7
Originally Posted by Crisisman
As for the lean code, check your MAF and clamps on the intake maybe??? Perhaps something is coming loose and letting a little extra air in?
Have a scanner of any sorts? Maybe able to read if it is getting any KR at all or what your fuel trims are sitting around? The van would shoot up to 12 in KR in no time, LTFT were constantly 22+ (lean) and his maf wouldn't read about 5,600Hz. Old man didn't believe me when I told him his MAF was bad and he got a new fuel pump.
Car seem to run fine? Doesn't fall on its face at all going WOT does it?
Trending Topics
09-28-2007, 08:45 PM
#9
On The Tree
Thread Starter
Join Date: Jun 2005
Location: Bellevue, WA
Posts: 113
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Rawr256
My dads van has thrown these codes and the MAF completely crapped out shortly after. Granted it is a 3400 V6, not a LS6, but still sensor related.
Have a scanner of any sorts? Maybe able to read if it is getting any KR at all or what your fuel trims are sitting around? The van would shoot up to 12 in KR in no time, LTFT were constantly 22+ (lean) and his maf wouldn't read about 5,600Hz. Old man didn't believe me when I told him his MAF was bad and he got a new fuel pump.
Car seem to run fine? Doesn't fall on its face at all going WOT does it?
Have a scanner of any sorts? Maybe able to read if it is getting any KR at all or what your fuel trims are sitting around? The van would shoot up to 12 in KR in no time, LTFT were constantly 22+ (lean) and his maf wouldn't read about 5,600Hz. Old man didn't believe me when I told him his MAF was bad and he got a new fuel pump.
Car seem to run fine? Doesn't fall on its face at all going WOT does it?
Car runs great. I reset the CEL and it hasn't returned yet.
