walterschmitz95
Sonic oxygen sensor heater failure
Summary of the thread
A 2020 Chevrolet Sonic owner experienced a persistent check engine light and increased fuel consumption, with a diagnostic scan indicating an oxygen sensor heater failure. Despite checking for visible wiring and connector damage, the issue persisted. Suggestions included testing the sensor's heater element, but due to uncertainty, a professional workshop was recommended. Ultimately, the problem was traced to a faulty connector, which was repaired, resolving the issue.
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4 comment(s)
walterschmitz95 (community.author)
Testing the sensor is a good point. How exactly would I do that? I'm not sure where to start when it comes to testing the heater element specifically. Any tips or things I should look out for? Is there a specific voltage I should be expecting?
RickyFrost
Testing can be tricky without the right tools. Honestly, with those symptoms and mileage, it's likely the sensor itself is just worn out, or it could be just the connection. Given that you're unsure, you might want to get a professional opinion from a workshop. They can pinpoint the issue quickly before you waste time and money chasing ghosts.
walterschmitz95 (community.author)
Thanks for the advice. I think you're right, taking it to a workshop is probably the best bet. It's frustrating because I like to try and fix things myself when I can. It turned out it was the connector. The repair bill was 95€, but at least the car is working again!
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CHEVROLET
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SONIC
RickyFrost
Oxygen sensor heater failure can definitely trigger the check engine light and mess with your fuel economy. Have you tried testing the sensor itself to see if the heater element is actually working? It might be more than just a cable problem.