|
I think the front o2’s report fuel ratios and the rears report cat efficiency and calibrate the front o2’s. If your rears are truly disabled, they shouldn’t be. Stage 2 and up tunes should keep your light off but all they do is prevent the readiness from setting. It’s likely o2 related or possibly injector related. I would find a new shop that can smoke test your whole intake system and check for leaks. This shouldn’t be tune related but try switching back to stock tune.
|