marthamystic9

S40 Radar Sensor Error

Hey, I've got a 2012 Volvo S40 diesel. At 207695 km, I'm getting a radar sensor error message. Warning light's on, and other systems are failing. The error is stored. I'm thinking it might just be a dirty sensor? Anyone else seen this?

A 2012 Volvo S40 owner experienced a radar sensor error message, causing warning lights and system failures. The issue was suspected to be a dirty sensor. Another S40 owner suggested checking for dirt or obstructions near the sensor, located behind the front bumper. After cleaning the sensor, the problem was resolved, restoring normal function.

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4 comment(s)

I also own an S40, and that sounds like something I went through. If it's the radar sensor, it can mess with other systems since they're linked. Do you know the exact error code? Have you checked the sensor for damage or anything blocking it?

Thanks! I don't know the error code yet, but I'll check. Where's the radar sensor on the S40? And by 'obstructions,' do you mean just dirt, or could something else be in the way?

On my S40, it's behind the front bumper, near a fog light. It's exposed. Obstructions could be dirt, mud, or ice. If cleaning doesn't fix it, it could be a bigger issue, like the sensor itself. A workshop diagnosis is best, radar calibration is delicate. My repair was around 45€.

Thanks a lot for the advice! I'll check for dirt or damage. If that doesn't work, I'll get it diagnosed and calibrated. Good to know others have had this. Turns out, the sensor was just dirty. Cleaned it, and everything's back to normal.

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VOLVO

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S40