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Originally Posted by Raven
nope. reprogrammed ECU, clear codes and re-learn crankshaht. i ask he said it was a new reflash. i had the most updated flash, but i guess this one is newer.
it was EE PROM - reprogramming (install new opcode: J6354
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Might have just been an "over-burn" (reflashing / overwriting the same calibration file over the existing identical file) I am not aware of any new calibrations available at this time , but if you would be willing to PM me your VIN I could check it in the system. The P0420 basically means your second O2 (after the CAT) was not observing sufficient oxygen content being created by the CAT. Sure it could have been a calibration issue, but my suspicion is that the over-burn just "reset" the statistical base-line used to set the DTC from. Interesting to see if the MIL pops up again over the next couple weeks.
Keep us informed
WOT
PS> The J6354 means that at least the tech got paid for a NFF!!
