![]() Is it possible I need a new wiring harness? Or could it be the HPFP or LPFP? Any other ideas welcomed. Here's the most recent scan with several faults, followed by the last scan before I replaced the O2 sensors. Also some popping/backfiring sound (sounds like popcorn popping) when downshifting to a stop or a slowdown. Definite rotten egg smell when I get out of the car and smell the exhaust. I couldn't easily reach the B1 S2 sensor and when I replaced B2 S2 it looked quite ok so I didn't yet replace B1 S2.Īfter each repair, the car seems to run fine for a day or so (kind of like something resets for a bit), and then goes back to the same fuel rich, hesitating, choking at start, super low idle/rough idle, especially bad on hotter days (80F plus). ![]() ![]() I have had the PCV valve replaced (local shop), new spark plugs, replaced all MAP sensors, and replaced B1S1 Lambda O2, B2 both O2 sensors. This guy like me has has problem milliage is too same can ayone helpġ.So there's an issue I've been having with my 2012 S4M.
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