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Croma Manifold Pressure Sensor Fault

I own a 2006 Fiat Croma with a diesel engine and I'm experiencing issues. The check engine light is on, and I've noticed a reduction in engine power, leading to poor engine response and higher fuel consumption. My mechanic says the manifold pressure sensor is faulty, probably due to a large vacuum leakage. The car only has 72634 km. Has anyone encountered a similar problem?

A 2006 Fiat Croma with a diesel engine was experiencing issues such as the check engine light being on, reduced engine power, poor response, and increased fuel consumption. The mechanic identified a faulty manifold pressure sensor, likely due to a large vacuum leak, as the cause. Suggestions included checking for cracks or loose connections around the intake manifold and conducting a smoke test to locate the leak. The problem was resolved by replacing the sensor and repairing the vacuum leak, restoring the car's performance.

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4 comment(s)

I had a similar issue with my old Peugeot 307, though mine was a petrol version. Exact same symptoms: check engine light, sluggish performance, and drinking fuel like it was going out of style. Turned out to be the MAP sensor. Have you checked for any obvious cracks or loose connections around the intake manifold? Sometimes it's just a simple fix.

I'll check for cracks and loose connections. I didn't think to look for those. When you had the issue with your Peugeot, was the sensor replacement difficult? Did a vacuum leak cause the sensor failure?

The sensor itself was easy enough to replace on the Peugeot. Just a couple of bolts and an electrical connector. The vacuum leak was the real pain to track down; a tiny split in a hose was causing all the trouble. If your mechanic suspects a large leak, they should be able to find it with a smoke test or similar. I ended up taking it to a workshop in the end. Seems like you should do the same to avoid further expenses.

I've decided to take it to the workshop as you suggested. They confirmed it was indeed the manifold pressure sensor and a vacuum leak. Sensor replacement and repair of the leak came to 235€. The car is running perfectly now!

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FIAT

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CROMA