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2019 M157 with Stage 1 Eurocharged ECU flash tune and 2nd cat delete. Getting intermittent CEL throwing P0299 code. Occurs even when I flash the ECU back to stock. Car does not feel underpowered or drive differently when light is on. Took in to the dealer but CEL was off (of course). Per SA turbos and exhaust all looked good. I used the code reader to clear the code, but it comes back. Anyone have ideas?
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