Chosen Solution
Getting Error P2a03 from the OBD guage. We’ve had the O2 sensors checked, and they all seem functional. Mechanic thinks it needs new gaskets. Any thoughts?
This post from a Nissan Z forum seems to say that it was in fact a faulty O2 sensor. If you read the replies someone does mention something about a gasket, but that it was for a P2A00, not P2A03. The original poster there had an incident where he scraped the bottom of his car. Did anything like that happen to your Sentra?
