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DS4 Oxygen Sensor Issue

Has anyone had an oxygen sensor heater circuit failure on a 2022 Citroen DS4 hybrid? I'm getting that error, plus a check engine light and worse fuel consumption, at 140741 kilometers. Could a bad cable or plug cause this?

A 2022 Citroen DS4 hybrid is experiencing an oxygen sensor heater circuit failure, indicated by a check engine light and reduced fuel efficiency at 140,741 kilometers. The issue could be caused by a faulty sensor, bad cable, or plug. It is suggested to first check the wiring and connections, and if necessary, replace the sensor to resolve the problem.

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4 comment(s)

DS4, eh? Sounds familiar. Check engine light and higher fuel consumption are classic signs. O2 sensor heater circuit... Did you check the sensor's resistance? Is it within range? I've seen similar problems when the air-fuel ratio goes out of whack.

Thanks! I haven't measured the sensor's resistance yet. Did you fix your issue by replacing the sensor, or did you check the wiring first?

Mine was a faulty sensor. I'd check the wiring and connections first, just in case. But the shop recommended replacing the sensor after their diagnostics. Saved me a headache.

Thanks, that's helpful. Replacing the sensor seems like the next step. The repair should be around 95€. I'll post what happens after the repair.

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CITROEN

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DS4