cooperlee

I have headers, tune, row with 55k miles. CEL just came on reading system stuck rich (bank 1). Had the code clear and came right back on after about 5 miles of driving. Car is idling a bit rough and running very rich. Does anyone have this experience with theirs? My local mechanic told me to swap out a new O2 sensor (primary one) and see if this fixes the issue.

ritalin

Exact same problem i had.
Primary o2's did the trick.