po171 - System too lean (Bank 1)
Apr 8, 2004, 09:49 AM
#7
You need to look at when your code was set. Look at the freeze frame data and look at what rpm's and how were the fuel trims at that rpm. It may sound like its chinese but that's the way you're supposed to check a code. My guess is that your idle is to lean.
Gil-superz
Gil-superz
Trending Topics
Apr 22, 2004, 02:16 PM
#8
I got the P0171 code twice. I got that after installing the AFCII with APEX filter, with APEXi specific setting (comes with the filter) which lean out the idle and low rpm. I got the CEL on when the car is idlling one day after and in very low rpm another day. I just zero out the low rpm range of the AFC today and hope that fix it.
Apr 22, 2004, 02:23 PM
#9
Evolved Member
iTrader: (11)
Join Date: Mar 2003
Location: chicago
Posts: 685
Likes: 0
Received 0 Likes
on
0 Posts
i agree with kcevo.. it just happened to me this week when i was playing around with the low throttle settings on my safc2.. so i just went back to zero adjustments under 3000rpms.. i'm gonna play with it again using my wideband this weekend.. cus my mpg is just horrible!
Apr 22, 2004, 05:06 PM
#10
Evolved Member
iTrader: (1)
Join Date: Sep 2003
Location: 60110/60659
Posts: 1,083
Likes: 0
Received 0 Likes
on
0 Posts
A friend of mine has the same code. Ever since he installed 272 in/ex. He also has 720cc, walbro GSS342 and AFC ect. His freeze frame showed 950 rpm so he was idling.
May 1, 2004, 11:50 AM
#11
I totally dismounted the AFC and I still get it. Not the tuning because I have this before Turbotrix flash my car, I went to autozone to check the code again, the guy pull out a little booklet. For P0171, system too lean, It could be a/ MAF sensor, b/ Oxyen sensor, c/ vacuum leak.
Thread
Thread Starter
Forum
Replies
Last Post
