tildawilliams59
Puma Oxygen Sensor Heater Circuit Error
Summary of the thread
A 2021 Ford Puma with a gasoline engine exhibited a check engine light and an error related to the oxygen sensor heater circuit, along with increased fuel consumption. The issue was suspected to be a faulty oxygen sensor or its heater circuit. After a visual inspection showed no obvious damage, further testing was recommended. Ultimately, a workshop visit confirmed a defective cable or plug connection, which was repaired, resolving the problem.
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4 comment(s)
tildawilliams59 (community.author)
Thank you for the quick response. I have visually checked the wiring and connector, and I didn't observe any obvious damage. Is there a specific method for thoroughly testing the sensor and the heater circuit's functionality?
georgmystic2
While a visual inspection is a good first step, a more definitive test would involve using a multimeter to check for voltage and continuity at the sensor connector. If you're not comfortable performing electrical testing, I would advise consulting a qualified technician. Given your symptoms, and the potential complexity of diagnosing sensor issues, a workshop visit would be a sensible next step.
tildawilliams59 (community.author)
Thank you for the advice. I followed your suggestion and took the Puma to a workshop. As suspected, the cable or plug connection of the component was defective. The repair cost me 95€. The problem is now resolved.
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FORD
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PUMA
georgmystic2
It certainly sounds like a plausible diagnosis. The symptoms you've described, along with the error code, strongly suggest a problem with the oxygen sensor or its associated heater circuit. Have you inspected the wiring and plug connection to the sensor? A damaged cable or a loose connection could very well be the culprit.