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Discussion Starter · #1 ·
First of all, I know that causes of P1148 and P0031 have been covered several times in other post. The point of this post is to narrow down if its a tuning issue or an installation problem before the finger pointing begins. I've already shown my installer these codes prior to driving off with the car following an installation of a CATTED downpipe.

https://drive.google...iew?usp=sharing

Basically, the AF in Bank 1 is not moving (the min and max are virtually identical). Is this indicative of a bad or misplaced O2 Sensor?
 

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Take a log and post it up. Some normal driving and a short 3rd gear rip. Looks like a bad sensor to me. They are quite fragile, and easily damaged. We keep them on hand and usually advise people to use at least new front sensors. If A/F sticks like that during normal driving the car will eventually spit a B1 O2 code out.
 
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