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P0018 P0019 P0021 after OFT tune back to stock
My car was on a stage 2 e85 tune and got rodknock. After getting the engine rebuilt at a shop and driving it until empty, I switched the tune back to the car's original tune to get it smogged. There were no check engine lights with the e85 tune, but now it has P0018 and P0019. P0021 also showed up before but after clearing it, it's not there right now. Any help is appreciated
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