DTC P0172 has shown up

vettenuts · 07-01-2006, 02:18 PM

Filled tank with Mobil early in the week then brought the car home and parked due to our recent lovely weather. Finally got out in it last night and DTC P0172 (Rich Bank 1) kept setting while driving. I have read the manual on this code and am wondering if the fuel tables need to be tweaked. It is only bank 1, but with the slight differences that can exist in injectors it might be only bank 1 that has exceeded the threshold. Car has a custom tune and has run fine to this point in time.

Has anyone else slayed this dragon?

Beer99C5@FastbirdPerf.com · 07-02-2006, 02:04 AM

I had it show up shortly after running Nitrous for the first time w/ about 49k miles on the car, I cleared it with a Predator and it has not come back. I had it on both banks.

vettenuts · 07-10-2006, 09:38 PM

Appears to be coming up in cell 1 only so far from logging.

mitch1959 · 07-10-2006, 10:21 PM

I had the same thing happen to me turned out to be a bad o2 sensor replaced sensor code gone.when reviewing data log found bank going 100% lean when letting off the gas

vettenuts · 07-11-2006, 07:03 AM

I think that is my next move, when I monitor the data when I go to cell 1 bank 1 goes low. There are likely other cells doing the same thing. All other parameters hardly change so there doesn't appear to be a vacuum leak or issues with the EVAP circuit since those values hardly change between cells and the prior cell the car was running in were fine. Have a feeling my O2 is FUBAR at this point.