helena_williams1

Fiat Stilo oxygen sensor fault

Hi, I've got a bit of a head-scratcher with my 2004 Fiat Stilo, gasoline engine. It’s got 140550 km on the clock. Lately, the check engine light has been making regular appearances, and the error memory's logging something. I've also noticed the fuel consumption creeping up. I'm thinking it might be the oxygen sensor, maybe a dodgy cable or connection? Anyone else had similar?

A 2004 Fiat Stilo with 140,550 km is experiencing a recurring check engine light and increased fuel consumption, suspected to be related to the oxygen sensor. The issue might stem from a faulty cable or connection to the sensor. It is advised to inspect the sensor's cable and plug for physical damage or corrosion. Ultimately, a workshop visit confirmed a faulty connection, and replacing the sensor resolved the problem.

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4 comment(s)

Interesting. I had a very similar issue with my old Opel Astra. Same symptoms: error light, stored error code, and increased fuel consumption. In my case, the oxygen sensor was indeed the culprit. First, you should check the sensor's cable and plug. They are sensitive to corrosion.

Thanks for the quick reply! When you say check the cable and plug, what exactly am I looking for? Obvious breaks or just generally corroded?

Precisely. Look for any signs of physical damage to the cable – cuts, fraying, etc. Also, check the plug for corrosion or loose pins. However, based on your description, I strongly recommend that you take your Fiat to a workshop.

Thanks for the advice. I took it to the workshop as suggested, and you were spot on. It was a faulty connection to the oxygen sensor. New sensor and fitting later, cost me 95€, and all seems good now!

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FIAT

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STILO