Peugeot 207 Start Stop Fault

My 2006 Peugeot 207 diesel's start-stop system isn't working. I have an error stored, the engine shuts off on its own, and there's a warning light. Could a deeply discharged or defective battery be the problem?

4 comment(s)

Sounds like classic battery behavior. Is the car struggling to start? Have you checked the battery's voltage? When was the battery last replaced?

It cranks a little slower, but nothing alarming. I haven't checked the voltage yet. I don't remember when the battery was last changed. Could a tired battery really cause those specific errors?

Modern systems are incredibly sensitive to voltage drops. The error code and start-stop malfunction are dead giveaways. Given the age and mileage, a new battery is very likely. You could try charging it, but it's probably on its way out. Get it tested before replacing it.

I had the battery diagnosed. It was heavily discharged and defective. Cost 290€ to get it sorted, but the errors are gone.

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