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FinnRider

Seat Leon start stop error after the vehicle has not been moved for a longer period of time

Hey everyone, I have a problem with my 2015 Seat Leon Diesel (218765 km). The car won't start, has high fuel consumption, a warning light comes on in the speedometer and the lights sometimes flicker. Could this be due to the engine start/stop system? I recently had a bad experience with my garage and wanted to hear if anyone has had similar problems and what your experiences were with your mechanics. Thank you!

(Translated from German)

Summary of the thread

A 2015 Seat Leon Diesel is experiencing starting issues, high fuel consumption, warning lights, and flickering lights, potentially linked to the engine start/stop system. A similar case with a Seat Ibiza was resolved by replacing and reprogramming a defective control unit. Another suggestion is to check the alternator or battery, as they can also cause similar symptoms.

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5 comment(s)

SpeedyGerd

Hey, I had similar problems with my 2016 Seat Ibiza (approx. same mileage). In my case, the control unit was defective, which led to exactly the same symptoms: Car wouldn't start, high fuel consumption, warning light and flickering lights. The control unit was replaced and reprogrammed in the workshop, and the car has been running perfectly ever since. It's definitely a serious issue, but with the right mechanic you can get it sorted. Good luck!

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FinnRider (community.author)

Hey, thanks for the info! Do you remember how much you paid to replace and program the control unit? Were there any further problems afterwards or did everything run smoothly again? Best regards!

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SpeedyGerd

Hey, I'm glad I could help you! Yes, I remember exactly: replacing and programming the control unit cost me €1000. Since I've been to the mechanic, the fault in the engine start-stop system has been rectified and the car is running perfectly again. No further problems since then. Good luck with your repair and best wishes!

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FinnRider (community.author)

Hey, thanks for all the information, that definitely helps me! So I do have a chance of getting the problem under control. I'll probably visit the garage again and hope that my mechanic doesn't do a bad job this time. I'll let you know how it goes as soon as I have more information. Thanks again and best regards!

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SEAT

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LEON