P0171 Lean code on Stock SS..can it be fixed with HPT?
02-04-2007, 09:50 PM
#1
Member
Thread Starter
Join Date: 06-28-05
Location: Pitt Meadows, BC
Posts: 369
Likes: 0
Received 0 Likes
on
0 Posts
P0171 Lean code on Stock SS..can it be fixed with HPT?
Hey guys,
well, intake is in and i get the famous P0171 lean code on my stock 05 SS. Now, i know the updated stage 2 tune ups the MAF sensor to 11,000 from 10,000 to fix this. Is this all that needs to be done to the stock tune to rid of the p0171 code?
Thanks!
Nate
well, intake is in and i get the famous P0171 lean code on my stock 05 SS. Now, i know the updated stage 2 tune ups the MAF sensor to 11,000 from 10,000 to fix this. Is this all that needs to be done to the stock tune to rid of the p0171 code?
Thanks!
Nate
02-04-2007, 09:53 PM
#2
Senior Member
Join Date: 01-27-06
Location: eh
Posts: 2,239
Likes: 0
Received 0 Likes
on
0 Posts
Mines set at 12500.
02-04-2007, 10:06 PM
#4
Senior Member
Join Date: 01-27-06
Location: eh
Posts: 2,239
Likes: 0
Received 0 Likes
on
0 Posts
02-04-2007, 10:18 PM
#5
Member
Thread Starter
Join Date: 06-28-05
Location: Pitt Meadows, BC
Posts: 369
Likes: 0
Received 0 Likes
on
0 Posts
mmm... good to know 
Anybody else want to confirm this
oh.. does this just mean that its lean at idle or at more then one point? would tuning the stft's and ltft's essentially fix this and maf could be left at 10000?
Nate
Anybody else want to confirm this oh.. does this just mean that its lean at idle or at more then one point? would tuning the stft's and ltft's essentially fix this and maf could be left at 10000?
Nate
02-04-2007, 10:24 PM
#7
Senior Member
Join Date: 01-27-06
Location: eh
Posts: 2,239
Likes: 0
Received 0 Likes
on
0 Posts
02-04-2007, 11:42 PM
#9
Senior Member
Join Date: 03-03-06
Location: Pittsburgh, PA
Posts: 4,958
Likes: 0
Received 0 Likes
on
0 Posts
Thats a fix for a different problem. Your problem has to do with a MAF not calibrated correctly.
The fix you posted has to do with the MAF going out of range due to high airflow.
The fix you posted has to do with the MAF going out of range due to high airflow.
02-04-2007, 11:43 PM
#10
Senior Member
Join Date: 01-27-06
Location: eh
Posts: 2,239
Likes: 0
Received 0 Likes
on
0 Posts
Yah I do standup.....I standup and everyone laughs.
Yep. The 12500 setting won't get rid of the code.
Yep. The 12500 setting won't get rid of the code.
Last edited by Matty; 02-04-2007 at 11:43 PM. Reason: Automerged Doublepost
02-05-2007, 10:14 AM
#14
Senior Member
Join Date: 01-27-06
Location: eh
Posts: 2,239
Likes: 0
Received 0 Likes
on
0 Posts
Maybe your Maf is screwed.
02-05-2007, 10:24 AM
#15
Senior Member
Join Date: 04-01-06
Location: Virginia Beach . Virginia
Posts: 2,001
Likes: 0
Received 0 Likes
on
0 Posts
He said P0171(System Too Lean (Bank 1)) not P0103 Mass Air Flow (MAF) Circuit High Input
A code P0171 may mean that one or more of the following has happened:
* The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters (K&N, etc.) can cause the MAF to become dirty if the filter is over-oiled
* There could be a vacuum leak downstream of the MAF sensor.
02-05-2007, 10:28 AM
#16
Senior Member
Join Date: 01-27-06
Location: eh
Posts: 2,239
Likes: 0
Received 0 Likes
on
0 Posts
Uhh not to sound like a dick but did any of yall read what he said ???
He said P0171(System Too Lean (Bank 1)) not P0103 Mass Air Flow (MAF) Circuit High Input
A code P0171 may mean that one or more of the following has happened:
* The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters (K&N, etc.) can cause the MAF to become dirty if the filter is over-oiled
* There could be a vacuum leak downstream of the MAF sensor.
He said P0171(System Too Lean (Bank 1)) not P0103 Mass Air Flow (MAF) Circuit High Input
A code P0171 may mean that one or more of the following has happened:
* The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters (K&N, etc.) can cause the MAF to become dirty if the filter is over-oiled
* There could be a vacuum leak downstream of the MAF sensor.
02-05-2007, 10:29 AM
#17
Senior Member
Join Date: 03-03-06
Location: Pittsburgh, PA
Posts: 4,958
Likes: 0
Received 0 Likes
on
0 Posts
Uhh not to sound like a dick but did any of yall read what he said ???
He said P0171(System Too Lean (Bank 1)) not P0103 Mass Air Flow (MAF) Circuit High Input
A code P0171 may mean that one or more of the following has happened:
* The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters (K&N, etc.) can cause the MAF to become dirty if the filter is over-oiled
* There could be a vacuum leak downstream of the MAF sensor.
He said P0171(System Too Lean (Bank 1)) not P0103 Mass Air Flow (MAF) Circuit High Input
A code P0171 may mean that one or more of the following has happened:
* The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters (K&N, etc.) can cause the MAF to become dirty if the filter is over-oiled
* There could be a vacuum leak downstream of the MAF sensor.
02-05-2007, 10:32 AM
#18
Senior Member
Join Date: 04-01-06
Location: Virginia Beach . Virginia
Posts: 2,001
Likes: 0
Received 0 Likes
on
0 Posts
02-05-2007, 10:33 AM
#20
Senior Member
Join Date: 04-01-06
Location: Virginia Beach . Virginia
Posts: 2,001
Likes: 0
Received 0 Likes
on
0 Posts
02-05-2007, 10:35 AM
#21
Senior Member
Join Date: 01-27-06
Location: eh
Posts: 2,239
Likes: 0
Received 0 Likes
on
0 Posts
02-05-2007, 10:36 AM
#22
Senior Member
Join Date: 03-03-06
Location: Pittsburgh, PA
Posts: 4,958
Likes: 0
Received 0 Likes
on
0 Posts
If he has an Injen or similar diameter intake, multiply your MAF values by "1.15" (15%). Your PE will probably be off a bit rich at wide open throttle, but just decrease the mutliplier slightly where you need to be.
02-06-2007, 03:59 PM
#23
Member
Join Date: 06-26-06
Location: York, PA
Posts: 359
Likes: 0
Received 0 Likes
on
0 Posts
Ok, reset the ECU yesterday. Drove the car like an old lady staying out of boost and I still get the P0171 CEL.. Also monitoring KR with my Intercepter I noticed I get some knock when getting on the throttle... 
This is on a stock GM stage 2 setup, with just Injen CAI.
Should I calibrate my MAF and multiply by 1.15? I would like to get rid of this code. I have a wideband but not hooked up yet. Anything else I should do in HP?
This is on a stock GM stage 2 setup, with just Injen CAI.
Should I calibrate my MAF and multiply by 1.15? I would like to get rid of this code. I have a wideband but not hooked up yet. Anything else I should do in HP?
02-07-2007, 01:20 AM
#24
Senior Member
Join Date: 03-03-06
Location: Pittsburgh, PA
Posts: 4,958
Likes: 0
Received 0 Likes
on
0 Posts
Ok, reset the ECU yesterday. Drove the car like an old lady staying out of boost and I still get the P0171 CEL.. Also monitoring KR with my Intercepter I noticed I get some knock when getting on the throttle...
This is on a stock GM stage 2 setup, with just Injen CAI.
Should I calibrate my MAF and multiply by 1.15? I would like to get rid of this code. I have a wideband but not hooked up yet. Anything else I should do in HP?
This is on a stock GM stage 2 setup, with just Injen CAI.
Should I calibrate my MAF and multiply by 1.15? I would like to get rid of this code. I have a wideband but not hooked up yet. Anything else I should do in HP?
Anyways, I've noticed that Injen intakes seem to throw the MAF off by exactly 15%, however when you change that, you're gonna run really really rich in PE (like spark blowout rich), seems GM stock cal with stock intake is off by like 8-10% too lean. The 15% thing usually calibrates the MAF, don't recal it then add 15, or it'll be a mess.
02-07-2007, 11:12 PM
#25
Member
Join Date: 06-26-06
Location: York, PA
Posts: 359
Likes: 0
Received 0 Likes
on
0 Posts
Yea, im not even going to alter my PCM without having my wideband hooked up. Others have suggested multiply by 1.07 and monitor things accordingly. What to do..what to do...