Quote:
Originally Posted by Scavanger
so I have a 13 10 series frs just had the motor replaced and im having this issue now (didn't have it with the old motor) RPMs will go between 550ish to 1000 and It threw a CEL for codes P015A P015B P119E and P219A talked to the dealership and they don't know what the issue is any help. Also I checked my AFRs and they go from 11 ( where it hits 550 RPMs) to 20.4 (1000 RPMs). Any help? Tuned with a custom ECU tune for intake manifold, intake, and full exhaust. (I did have to put back on my stock headers since the last ones cracked yay shitty welds)
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Those codes are afr imballance and o2 sensor slow respomse.
possible stuffed 02 sensor cracked damaged leaking at seal not in bung all the way ect or its been contaminated with grease\oil ect.
might also be exhaust air leak did you use new gaskets ?
ive seen those caused also when poeple mistakenly put o2 spacer on the front o2sensor instead of rear one or they plug the wrong sensors in , should be black plug to black socket grey to grey, also one exhaust shop did not even plug sensors back in :-)