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friedhelmdragon72

Epica preheating lamp and check engine light

I own a 2012 Chevrolet Epica with a diesel engine. Lately, the preheating lamp doesn't switch off, and the check engine light is on. Also, I noticed smoke when accelerating. I suspect the preheating control unit is defective. Mileage is 34184 km. Could a faulty cable or plug connection to this component be the cause?

Summary of the thread

A 2012 Chevrolet Epica with a diesel engine is experiencing issues with the preheating lamp not switching off, the check engine light being on, and smoke during acceleration. These symptoms suggest a potential problem with the preheating control unit. Possible causes include a defective control unit or faulty cable or plug connections. Checking the fuses is recommended as a preliminary step, but professional inspection at a workshop is advised for accurate diagnosis and repair.

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4 comment(s)

patricia_frost1

I had a similar issue with my Epica. Those symptoms do sound like a preheating control unit problem. Have you checked the fuses? Sometimes, a blown fuse can cause similar issues, like a short circuit in your house. It's a cheaper thing to check before diving into the unit itself.

friedhelmdragon72 (community.author)

Thanks for the hint. Which fuse exactly should I check? Any idea where it is located?

patricia_frost1

Unfortunately, I don't remember the exact number, but it's located in the fuse box under the hood. Check the diagram on the fuse box cover; it should be indicated there. However, in my case, it wasn't the fuse. I went to the workshop, and they identified the defective preheating control unit. The repair cost was around 95€.

friedhelmdragon72 (community.author)

Thanks a lot for sharing your experience! I will take it to the workshop for inspection. Your information is much appreciated.

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CHEVROLET

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EPICA