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paullion9

Croma Cylinder Pressure Fluctuations

My 2007 Fiat Croma diesel is showing cylinder pressure fluctuations, leading to higher fuel consumption, reduced engine power, and the check engine light. I've checked spark plugs, crankshaft, and turbocharger. Could it be a head gasket or timing belt issue?

Summary of the thread

A 2007 Fiat Croma diesel exhibited cylinder pressure fluctuations, resulting in increased fuel consumption, reduced engine power, and an illuminated check engine light. Initial checks on spark plugs, crankshaft, and turbocharger were inconclusive, leading to speculation about potential head gasket or timing belt issues. However, the problem was ultimately traced to a faulty sensor causing misreadings, and replacing the sensor resolved the issue without any cost.

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4 comment(s)

leomayer45

I had something similar with my Croma. Didn't have the power I expected, and fuel consumption was way up. Is it also throwing any weird codes?

paullion9 (community.author)

No weird codes, only the one related to the cylinder pressure. What was your fix?

leomayer45

In my case, the cylinder pressure issue was actually a consequential error. Another underlying problem was causing the misreading. Get it properly diagnosed to save yourself a headache.

paullion9 (community.author)

You were spot on! Turns out it was a faulty sensor causing the misreading. Replaced it, and everything's back to normal. Cost me absolutely nothing. Thanks!

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FIAT

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CROMA