Skoda Roomster Diesel Preheating Lamp Issue

Sounds like a glow plug issue. Does it only happen on cold starts? Have you noticed any smoke from the exhaust when it struggles? Rough idle can really point to those being the problem, especially in a diesel. It's easy enough to check them with a multimeter if you're handy with tools.

Thanks for the quick reply! Yes, it's definitely worse when the engine is cold. I'm not really experienced with multimeters, so how exactly would I test them?

If it's worse when cold, and you're getting a glow plug error, I'd bet it's the culprit. Since you're not comfortable with a multimeter, I'd recommend taking it to a workshop. They can diagnose it properly and replace the faulty glow plugs. Otherwise, you will be chasing your tail. I'd expect it to be about 440€ for the job.

I took the Roomster to a workshop, and they confirmed the glow plugs were faulty. The replacement set me back 440€, but it runs great now. Thanks for the assistance!

I have a problem with my Skoda Roomster 1200 WW diesel. The glow plug light comes on occasionally at idle. What could be the cause?

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The intermittent glow plug light could indicate an issue with the glow plugs themselves, the glow plug relay, or the wiring. Start by checking the glow plug connections for any loose or corroded terminals. If the connections seem fine, it might be worth having the glow plugs tested individually for resistance with a multimeter. If you're not comfortable doing this, a mechanic can perform a thorough diagnostic. Let me know how it goes or if you have any further questions!