No reading on emissions test

Asked by Lisa Sep 20, 2020 at 05:20 PM about the 2007 Hyundai Tucson

Question type: Maintenance & Repair

When I went for emissions test computer is reading
“unset” on O2 sensor.  Will resetting ECU fuse reset
the sensor?

1 Answer
405

billybob567 answered 4 years ago

Computer detected an issue with my O2 sensor years ago. Garage replaced sensor and engine came back. They tried and again and still no luck. They took it to the dealer and they could not determine the issue either. My engine light has been on for all these years now. Thankfully it happened after the govt dropped the mandatory e-test. Car runs fine. Just letting you know all this because the O2 sensor error is not so easy in some cases to resolve.

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