Quote:
Originally Posted by Kmccarthy714
No test pipes or hfc and I just replaced the stock o2 with a Denso o2 on the passanger side
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Aftermarket sensors may read differently from the stock ones. If you are running mismatched O2 sensors, it is very possible and likely to throw a code because your ECU is seeing a voltage variance. I would either replace your other O2 sensor with a Denso, or replace the Denso with a stock one. Just make sure they match.