martinwolf7

Mistra oxygen sensor heater error

Check engine light woes with my 2018 Hyundai Mistra (gasoline engine). Only done 29664 km. I keep getting an error about the oxygen sensor heater. The check engine light is on, and I'm burning more fuel than usual. Suspect it's a dodgy cable or plug, anyone seen this before?

A 2018 Hyundai Mistra owner experienced a check engine light and increased fuel consumption, with an error indicating an oxygen sensor heater issue. The problem was suspected to be a faulty cable or plug. A similar case suggested checking the sensor connections, specifically the plug. After verifying the plug and visiting a workshop, the issue was confirmed to be a faulty sensor connection, which was resolved for 95€.

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4 comment(s)

I had a similar issue with my Mistra. Same symptoms: check engine light, higher fuel consumption, and the error code pointing to the oxygen sensor. Have you checked the sensor connections? That fixed it for me.

Cheers! When you say 'sensor connections', do you mean the plug itself, or further back along the wiring?

I meant the plug connecting to the sensor. If that doesn't fix the problem, it might be time to visit a workshop. In my case, it was a defective plug.

Thanks! After checking the plug, still no luck. Took it to a workshop, and you were right - faulty sensor connection. 95€ and all is well. Appreciate the help!

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HYUNDAI

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MISTRA