willithunder1

Marea Water Sensor Issue

My 2006 Fiat Marea diesel (167468 km) has a water sensor malfunction. The check engine light is on, there's an error code, and the engine runs rough, especially on cold starts. I've checked the sensor, and I think the cable or plug might be bad. Any ideas?

A 2006 Fiat Marea diesel is experiencing a water sensor malfunction, causing the check engine light to illuminate and the engine to run rough, particularly during cold starts. The issue may stem from a faulty sensor, cable, or plug. Suggestions include testing the sensor with a multimeter to check for bad data being sent to the ECU and inspecting the wiring for breaks or corrosion. Consulting a technician is advised due to the potential impact on the ECU.

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4 comment(s)

I had similar symptoms in my Marea. Before replacing parts, test the sensor with a multimeter. It could be sending bad data to the ECU. Also, check the wiring for breaks or corrosion. Diesel engines are sensitive to electrical issues.

Thanks! Could you explain the multimeter testing procedure? What resistance values should I expect, and what should I watch out for? Also, did the error code specifically mention the water sensor, or was it a more general code?

I didn't get into the multimeter specifics. It was similar to your issue, and I brought it to a local workshop since I didn't want to mess with the ECU. They diagnosed it quickly after checking the sensor signal.

Thanks for sharing your experience. Given the potential impact on the ECU, I'll consult a technician. I'll post the solution for others. The estimated repair cost is 95€.

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FIAT

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MAREA