tobiasschroeder96
Marea Knock Sensor Issue
Summary of the thread
A 2007 Fiat Marea with a gasoline engine exhibited a check engine light, increased fuel consumption, and uneven idling at 108,845 km. Diagnostics indicated a potential issue with the knock sensor, possibly due to a faulty cable or plug. A similar case was resolved by inspecting and repairing the wiring and plug connection to the knock sensor, which fixed the problem.
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4 comment(s)
tobiasschroeder96 (community.author)
Could you elaborate on the wiring and plug inspection? What signs of damage or corrosion did you see, and what tools or methods did you use to diagnose it?
peter_lange1
I'm no expert, but the mechanic showed me that the wire was loose in the plug, and the plug itself was a bit corroded. He cleaned the contacts, tightened things up, and that fixed it. Still, might be worth getting it checked by a professional, though.
tobiasschroeder96 (community.author)
Following your suggestion and after a workshop inspection, it was indeed a defective connection. Repairing the connection fixed it. The repair cost 95€.
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FIAT
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MAREA
peter_lange1
I had a similar issue with my Marea. The warning light was on, and the car felt like it was running on fewer cylinders. My mechanic said it was like trying to run a marathon with a pebble in your shoe. Have you checked the wiring and the plug connecting to the knock sensor itself? That's where my problem was.