manfred_dunkel30

V40 water sensor error

Hey, I'm having a weird issue with my 2015 Volvo V40 diesel. The check engine light keeps popping on, and when I hook it up to a reader, it throws an error related to the water sensor. Also, the engine runs pretty rough sometimes. I've checked the basics, like the sensor connection, and it looks okay. The car has about 93164 km on it. Any ideas?

A 2015 Volvo V40 diesel is experiencing a check engine light and rough engine performance, with an error related to the water sensor. The issue may stem from a faulty connection to the sensor, such as a defective cable or plug. A suggested solution is to perform a wiggle test on the wires to identify any changes, and if unresolved, seek professional inspection to potentially repair the connection.

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4 comment(s)

I had something similar with my V40. Same symptoms: engine light, error codes. It could be a faulty connection to the sensor. By 'sensor connection' I mean the cable or plug connection to the sensor. Have you tried wiggle-testing the wires while the engine is running to see if anything changes?

Wiggle-testing? Never heard of that, but it makes sense. So, just gently move the wires around near the sensor to see if the engine stumbles or the light flickers? Also, was it definitely the sensor connection in your case, or did you have to replace the whole sensor? I'm trying to avoid replacing it if it is not necessary

Yeah, wiggle the wires. That's what I did. But in the end, I brought it to a workshop. They found a defective cable/plug connection. They said it’s a common problem. Cost me 95€ for the repair, but the engine runs smooth again.

Thanks for the help! Sounds like it's worth getting it checked out by a professional. Looks like I'll be scheduling a visit to the local shop soon. Hopefully, it's just a connection issue and not the sensor itself. I will post what happens when it's sorted.

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VOLVO

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V40