alexander_drache4

RCZ Weak Battery

My RCZ (2011, diesel) is showing weak battery signs at 271k km. The engine cranks weakly, and the lights flicker. I suspect the battery sensor. Has anyone seen this before?

4 comment(s)

I had similar issues with my old Volvo V70. It turned out to be a faulty sensor causing a parasitic draw. Have you checked the battery voltage when the car is off? Maybe test the alternator output too?

The voltage drops significantly overnight. The alternator seems fine. Is the sensor the only thing left?

Based on what you've checked, it does sound like the sensor. Honestly, with electrical problems like this, I'd suggest a workshop diagnosis before throwing parts at it. I went through that with the Volvo, and it cost me a fortune.

Confirmed, it was the battery sensor. 315€ fixed it. Thanks for the advice.

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