georgblitz1

Trafic cylinder pressure fluctuations

I've got a 2004 Renault Trafic diesel that's throwing me for a loop. Mileage is at 166165 km. I'm seeing cylinder pressure fluctuations, higher fuel consumption, reduced engine power, and the check engine light is now a permanent fixture. I've checked the timing belt, head gasket seems fine, crankshaft sensor is reading okay, and I even took a peek at the camshaft. Spark plugs are obviously not the issue on a diesel, so I'm stumped. Anyone seen something similar?

4 comment(s)

Sounds frustrating! I had a similar issue with my old Saab 9-3, though the symptoms weren't quite the same. Cylinder pressure issues can be tricky. Did you check for any obvious leaks or damage to the injectors? What kind of readings are you getting from the pressure sensors?

Injectors seem fine, no visible leaks and spray pattern looks normal. Pressure sensor readings are fluctuating, but within what I'd consider a 'normal' range – that's what makes this so perplexing. With your Saab, was it also a fluctuating reading within an acceptable range, or something more obvious?

Ah, I see. In my case, it was a miscommunication between sensors that eventually manifested as an error code. I couldn't identify the root cause without professional diagnostic tools. Considering the sensor readings being within range, I'd recommend going to a trusted workshop to read out the error memory. It looks to me as if it could be a consequential error resulting from another, maybe unrelated, error.

Thanks for the insight. The 'consequential error' angle makes sense given the seemingly normal sensor readings. I'll take it to my workshop and post back on how it went. It was that, cost me 0€ to fix.

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