Smog in Cali, Any1 have an idea of what it could be?
so my car passes everything except for nox at 15mph as usual 240 issue, but i was just curious of what people think could be the issue. i'm going to re cliean the egr tubing, and i've already cleaned out the pors that lead off the egr on the engine.
linked to the post i have my smog results
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