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Unread 06-26-2013   #1 (permalink)
Mzsn95 is offline Rookie


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Default cant get rid of p1131 cel

Im running no cats and a bama tune and the light went off temporarily and came back with the p1131 code. I know this could be a bad bank 1 o2 sensor but i was wondering if that code could be for something else. I noticed that at idle it will drop to about 500 rpms before returning to normal. So now im thinking vacuum leak, egr, iac, or maf. Just wanted to know if anyone has been through a similar experience and can shed some light as to what i should attack first. Thanks guys!
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Unread 06-27-2013   #2 (permalink)
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Quote:
Originally Posted by Mzsn95 View Post
Im running no cats and a bama tune and the light went off temporarily and came back with the p1131 code. I know this could be a bad bank 1 o2 sensor but i was wondering if that code could be for something else. I noticed that at idle it will drop to about 500 rpms before returning to normal. So now im thinking vacuum leak, egr, iac, or maf. Just wanted to know if anyone has been through a similar experience and can shed some light as to what i should attack first. Thanks guys!
I'm sorry to hear about the issues you're having with your Tune. We send out thousands of tunes and build them all from the ground up for your PCM code and your mods. They're not just "canned" tunes, they're built custom by our team, so every once in a while it's possible we mess one up! We'll definitely get it straightened out for you, though if this is the case! Give one of our Bama Tuning Specialists a call and they'll work with you to figure out exactly what's going on.

Our Bama Performance tuning specialists are here in the building Monday-Friday from 9AM-5:30PM EST and Saturday 9AM-5:30PM EST

-Dan
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Unread 06-27-2013   #3 (permalink)
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P1131 is indicative of a lean condition at Bank 1 (passenger side of engine). Could also be a bad sensor, but in my observations O2 sensors are just doing their job 99% of the time and reporting an out of range value to the pcm, as opposed to being a failing sensor.

I think you're on the right track with your suspicions so far (vacuum leak, etc), but something else I would check out is whether or not a leak exists at the midpipe to manifold flange. You mentioned that you are not running cats, so that leads me to believe that you're running an aftermarket midpipe (as opposed to stock pipe with cats removed)? If that is correct, did you use a new gasket at that connection? That gasket there should be replaced any time the midpipe is removed, so if the answer to that last question is "no" then I would strongly suspect a leak there.
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Unread 06-29-2013   #4 (permalink)
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Sorry guys I thought I replied a few days ago but I guess it never went through. The tune was good I called American muscle a while back to make sure. I bought the car with the o/r h-pipe already on so ill put in on the lift and check that next to make sure it's done right, but I've done some research and I found a few people that had the same problem and it was the h-pipe manifold gasket so I'm hoping that's the problem. Thanks guys ill let you know what happens!


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