P0171 and P0174
Thread Starter
Heel & Toe
Joined: Dec 2005
Posts: 17
Likes: 0
From: Dawsonville GA
P0171 and P0174
Sorry for posting this in multiple sections. Wasn't sure where to put this
Note: I have searched this forum for the answers and have done as they recommended, but so far nothing has fixed my problem.
I have an 06 A6. For upgrades, I have K&N intake, 1" aluminum TB spacer, FAST 90mm intake manifold, and Borla catback system.
The last upgrade, the intake manifold, was put on in June. It was not until last week that the codes started popping up. I came here and searched the web for answers. I have so far tightened up every connection from the intake back and checked to make sure that the MAF sensor was clean. Each time I clear the codes, they come back after about an hours worth of driving.
Is there something that I'm missing? Do I just need a tune? Or am I just an idiot? Please help.
Note: I have searched this forum for the answers and have done as they recommended, but so far nothing has fixed my problem.
I have an 06 A6. For upgrades, I have K&N intake, 1" aluminum TB spacer, FAST 90mm intake manifold, and Borla catback system.
The last upgrade, the intake manifold, was put on in June. It was not until last week that the codes started popping up. I came here and searched the web for answers. I have so far tightened up every connection from the intake back and checked to make sure that the MAF sensor was clean. Each time I clear the codes, they come back after about an hours worth of driving.
Is there something that I'm missing? Do I just need a tune? Or am I just an idiot? Please help.
Burning Brakes
Joined: Mar 2006
Posts: 906
Likes: 1
From: SF Bay CA
yeah those are "system too lean bank 1&2" codes, dont think thats an install problem, alot of maf based cars read lean when you change the intake, might need a tune to get it straightened out, but Im a noob so dont take my word for it
Drifting
Joined: Nov 2005
Posts: 1,629
Likes: 3
From: Edmond OK
a maf should be able to compinsate for those few mods, I'd be more inclined to think it's a leak after the maf somewhere, like your intake manifold. get a butane torch, turn it on (don't light it!) and spry all around your intake manifold, if you hear the RPM's jump, you've found a leak.
Thread Starter
Heel & Toe
Joined: Dec 2005
Posts: 17
Likes: 0
From: Dawsonville GA
a maf should be able to compinsate for those few mods, I'd be more inclined to think it's a leak after the maf somewhere, like your intake manifold. get a butane torch, turn it on (don't light it!) and spry all around your intake manifold, if you hear the RPM's jump, you've found a leak.
Drifting
Joined: Nov 2002
Posts: 1,651
Likes: 125
From: laguna niguel ca
Those are lean bank codes at idle. The MAF doesn't like the way the air is comming in from the K&N intake. Has nothing to do with the FAST or the CAT back because they are after the MAF. Not an issue. Had the same problem with my stinger by Halltech until the car was retuned. So retune it, problem solved.
Burning Brakes
Joined: Mar 2006
Posts: 906
Likes: 1
From: SF Bay CA
a maf should be able to compinsate for those few mods, I'd be more inclined to think it's a leak after the maf somewhere, like your intake manifold. get a butane torch, turn it on (don't light it!) and spry all around your intake manifold, if you hear the RPM's jump, you've found a leak.
any leak after the maf wouldnt make you throw maf codes though
Burning Brakes
Joined: Mar 2006
Posts: 906
Likes: 1
From: SF Bay CA
Those are lean bank codes at idle. The MAF doesn't like the way the air is comming in from the K&N intake. Has nothing to do with the FAST or the CAT back because they are after the MAF. Not an issue. Had the same problem with my stinger by Halltech until the car was retuned. So retune it, problem solved.
Guest
Posts: n/a
Sorry for posting this in multiple sections. Wasn't sure where to put this
Note: I have searched this forum for the answers and have done as they recommended, but so far nothing has fixed my problem.
I have an 06 A6. For upgrades, I have K&N intake, 1" aluminum TB spacer, FAST 90mm intake manifold, and Borla catback system.
The last upgrade, the intake manifold, was put on in June. It was not until last week that the codes started popping up. I came here and searched the web for answers. I have so far tightened up every connection from the intake back and checked to make sure that the MAF sensor was clean. Each time I clear the codes, they come back after about an hours worth of driving.
Is there something that I'm missing? Do I just need a tune? Or am I just an idiot? Please help.
Note: I have searched this forum for the answers and have done as they recommended, but so far nothing has fixed my problem.
I have an 06 A6. For upgrades, I have K&N intake, 1" aluminum TB spacer, FAST 90mm intake manifold, and Borla catback system.
The last upgrade, the intake manifold, was put on in June. It was not until last week that the codes started popping up. I came here and searched the web for answers. I have so far tightened up every connection from the intake back and checked to make sure that the MAF sensor was clean. Each time I clear the codes, they come back after about an hours worth of driving.
Is there something that I'm missing? Do I just need a tune? Or am I just an idiot? Please help.
If you need some help with it, feel free to give me a call. I'll walk you through it over the phone 972 242 7665 ask for Sean.
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Drifting
Joined: Nov 2005
Posts: 1,629
Likes: 3
From: Edmond OK
I didn't actually look up the codes.. I was using the info you provided that the codes corosponded to a bank 1 lean and a bank 2 lean condition. in which case either a jacked up maf, or intake leak would cause.
Thread Starter
Heel & Toe
Joined: Dec 2005
Posts: 17
Likes: 0
From: Dawsonville GA
Thanks for the help. I appreciate it.
Considering that I don't have access to a scan tool, I'll have to go ahead and get my car tuned by a professional.
It just doesn't make any sense that this would only pop up after 6 months of not doing anything to the car besides driving and regular maintenance. Oh well... I guess that's just cars for ya.
Considering that I don't have access to a scan tool, I'll have to go ahead and get my car tuned by a professional.
It just doesn't make any sense that this would only pop up after 6 months of not doing anything to the car besides driving and regular maintenance. Oh well... I guess that's just cars for ya.
