dominikhunter9
Cronos oxygen sensor heater failure
Summary of the thread
A 2019 Fiat Cronos is experiencing a check engine light due to an oxygen sensor heater failure, leading to increased fuel consumption. The issue could stem from a faulty sensor or a bad connection. A similar case involved a loose pin in the connector, which was difficult to detect without proper tools. It is advised to have a professional inspect and repair the issue to avoid further complications.
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4 comment(s)
dominikhunter9 (community.author)
Thanks for the quick reply! I visually inspected the connector and wiring, but didn't see anything obvious. What did they find on your Volvo? Was it easy to spot once they knew where to look?
emilswift8
They found a loose pin in the connector itself. It was making intermittent contact, which triggered the error. It was hard to spot without the right tools to test the connections. If you're not comfortable doing that, I'd recommend taking it to a workshop before you make things worse.
dominikhunter9 (community.author)
Thanks so much for sharing your experience. I think I'll take your advice and bring it to a shop. Hopefully it will be a cheap fix. They quoted me 95€ for parts and labour. Keeping my fingers crossed!
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FIAT
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CRONOS
emilswift8
I had a similar issue with my old Volvo. Same symptoms: check engine light, and the error code pointed to the oxygen sensor. My mechanic said it could be a faulty sensor, but it turned out to be just a bad connection. Did you check the plug and wiring leading to the sensor for any damage or corrosion?