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luisemystic1

Mokka Rail Pressure Sensor Fault

I've got a 2017 Vauxhall Mokka with a gasoline engine and the check engine light is on. It keeps stalling at idle, and the engine power feels seriously reduced. My friend plugged it in, and it's showing a 'rail pressure sensor signal faulty' error. Anyone else had this?

4 comment(s)

luisestorm10

That sounds familiar. I've got a Mokka too, and I had a similar problem a while back. The error code pointed to the fuel pressure sensor as well. Were you able to check the wiring to the sensor? Sometimes it's just a loose connection or a damaged wire causing the issue.

luisemystic1 (Author)

Cheers for the reply! I haven't checked the wiring myself, to be honest. I wouldn't really know what I'm looking for. Where exactly is the sensor located? Is it easy to get to?

luisestorm10

Okay, so on mine, which I think is the same engine, the sensor is located on the fuel rail. You should be able to see it if you remove the engine cover. However, if you're not comfortable with car electrics, I'd strongly suggest taking it to a trusted mechanic. A faulty fuel injection system can cause serious damage. Better safe than sorry, especially with fuel pressure issues!

luisemystic1 (Author)

Thanks a bunch for the advice! Took it to a local mechanic and you were spot on. It was indeed the rail pressure sensor. They replaced it, and the car is running perfectly again. Cost me 240€ all in. Appreciate the help!

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