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sophiafeuer6
Corolla Diesel Cylinder Pressure Fluctuations
4 comment(s)
sophiafeuer6 (Author)
Interesting about the sensor on your Megane. I did a basic OBD scan, and it's throwing a bunch of generic codes related to misfires and pressure imbalances. Nothing specific though. It seems worse under load, like going uphill or accelerating. Could a dodgy sensor really cause this much havoc in a diesel?
lennyloewe63
Yeah, a faulty sensor can definitely cause chaos, especially with modern engine management systems. It's like a domino effect, one small problem leading to bigger issues. Since the OBD scan isn't giving you a clear answer, I'd recommend taking it to a workshop for a proper diagnostic. They can usually pinpoint the exact cause with more advanced tools. It might save you a ton of time and money in the long run. Good luck!
sophiafeuer6 (Author)
Thanks for the advice! I went to the workshop like you said, and they ran some fancy tests. It turned out to be a faulty EGR valve causing all the pressure weirdness. Replaced it, and the car's running perfectly now. Cost me 0€ because the dealership repaired it for free!
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lennyloewe63
Whoa, that sounds rough! I had a similar issue with my old Renault Megane, although it was a petrol engine. Same symptoms: higher fuel consumption and reduced engine power. For me, it turned out to be a faulty sensor messing with the air/fuel mixture. Think of it like a clogged artery - everything backs up! Have you had any diagnostics run to pinpoint the source of the fluctuation? Is it always happening or just under certain conditions?