A month ago with chill driving P2097 (Post catalyst fuel trim system too rich bank 1) came up on durametric. Cleared it and it came back 2 weeks later. A former certified PCAR tech who has a shop in Houston and powered up a 996TT for me back in 2008 suggested I :

First try swapping MAF from side to side and see if fault moves to bank 2.

If fault doesn't move , swap 02 from side to side. (I couldn't get to this part) because after swapping the MAF sensors from side to side I went to start the car and plug in durametric to clear the prior P2097 code and now a new code was present. I probably should have checked durametric prior to doing the swap because I don't know if this new code which shows twice was present prior to the swap or not? What came up was:

P2097

P1095 Air mass(HFM) ahead of throttle valve - implausible

The P1095 shows up twice one after the other. So I clear the codes to see what happens. One week later check eng light goes off again. The P1095 twice again one on top of the other so 2 lines but not the original P2097 bank 1 or 2.


It's pretty hot down in South TX now so not sure if the car is just running sluggish due to the heat or if something from these codes could be slowing it down. Did some reading and this new code P1095 seems common after a Throttle Body change with larger bore than stock if the car is not tuned for it, as well as leaks happening. But with me the P1095 didn't come up as far as I can tell until I swapped the sensors from left to right. Hard to know because I didn't do a read out prior to swapping.

Due to time the car is due for a serpentine belt and spark plugs so those will be done soon. Just wondering if anyone else has some good ideas?

Thanks,

Tom