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Opel Insignia check engine light, loss of power, engine jerks and the check engine light is on

Hey everyone, I have a problem with my 2015 Opel Insignia (gasoline, 217654 km) and I'm hoping for your help. My car is showing the following symptoms: black smoke from the exhaust when accelerating, check engine light on, loss of power, rough engine, jerking when accelerating, won't start, poor fuel economy, stalls at idle and vibrates at idle. I suspect it could be a faulty ignition coil or misfiring. Have any of you had similar problems? What was the cause and what was your experience with the garage? Many thanks in advance! LG

(Translated from German)

A 2015 Opel Insignia is experiencing issues including black smoke from the exhaust, a check engine light, loss of power, rough engine performance, jerking during acceleration, starting problems, poor fuel economy, stalling, and vibrations at idle. The initial suspicion is a faulty ignition coil or misfiring. A similar case with a 2017 Opel Astra revealed a defective engine control unit as the cause, which was resolved by replacing the unit and reloading the software. It is advised to have the car diagnosed at a garage promptly to prevent further damage.

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4 comment(s)

Hey, I had a similar problem with my 2017 Opel Astra (gasoline engine). My car also showed various symptoms such as black smoke, check engine light, loss of power and restless engine. After the diagnosis in the workshop, it turned out that the engine control unit was defective. This is definitely a serious problem. The garage explained to me that the engine control unit plays a central role in controlling the engine and can cause numerous malfunctions if it is defective. In my case, the component was replaced and the software reloaded. After that, the car ran perfectly again. I would recommend that you visit a garage as soon as possible and have your car diagnosed to avoid major damage. Good luck! LG

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Hey, thanks for the info! I hadn't thought about that before. Do you remember how much you paid for the replacement and the new software? And did you have any other problems with your Astra after the repair? LG

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Hey, sure, I can still remember it well. It cost me €1000 to repair the engine control unit back then. That was quite a lot of money. But I have to say that the Astra has been running smoothly ever since. The workshop also fixed the defective ignition coil or misfiring, so all the symptoms you described were gone afterwards. I hope this helps you. If you have the repair done, I wish you every success! Maybe you still have a warranty or something, which could reduce the costs. LG

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Hey, thanks for the detailed information! 1000 € is quite a lot, but if everything works again afterwards, it's probably worth the money. I'll definitely go to the garage as soon as possible and have it checked, maybe I'll be lucky and it's just a faulty ignition coil or even something minor. If it's the engine control unit, I'll probably have to bite the bullet. I hope that there won't be any more problems straight away. Let me know again when I know more details. Thanks again for your help and tips! LG

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OPEL

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INSIGNIA