Quote:
Originally Posted by rbail1
I am assuming that one of these codes is causing the other. Engine is 2016, ECU is 2014. Do these cars need a tune to run unequal length headers? Thinking maybe the 2014 ECU has a tune? Could there be incompatibilities with the 2016 vvt solenoids and the 2014 ecu? I know the solenoids have a different part number form 13-15 and 2016. Three of the vvt solenoids are new and the code is generating from the only solenoid that was not replaced. Going to swap sides and see if the code follows the old solenoid.
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Did you sort this out yet? After a tuning session, my FRS started bogging down like you described. Bad primary cat. I'm guessing the extra vibration from high rpm pulls loosened the cat material. It was an aftermarket header/cat. It took several drive cycles for the ecu to finally correct itself once I knocked the cat out.