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wolfgangschmid73

Latitude glow plug and check engine light issues

Hey, I'm having some trouble with my 2012 Renault Latitude diesel. The glow plug light won't turn off, the check engine light is on, and it's smoking like crazy when I accelerate. It's got 237756 km on the clock. I've checked the glow control unit and suspect a bad cable or plug connection. Anyone seen this before?

Summary of the thread

A 2012 Renault Latitude diesel is experiencing persistent glow plug and check engine light issues, accompanied by excessive smoke during acceleration. The problem may stem from a faulty glow plug relay, wiring harness, or corroded connections, leading to unburnt fuel and engine performance issues. The recommended solution is to have the vehicle professionally diagnosed and repaired, which resolved the issue by replacing the defective glow control unit and addressing a corroded connector.

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4 comment(s)

williamlight43

I had similar symptoms with my Latitude. Check the glow plug relay and wiring harness. A faulty relay can cause the preheating lamp to stay on and trigger the check engine light. The smoke could be from unburnt fuel if the preheating isn't working correctly.

wolfgangschmid73 (community.author)

Thanks for the tip! Where exactly is the glow plug relay located in the Latitude? And did you also experience rough idling or vehicle stalling in addition to the other issues?

williamlight43

Yes, rough idling was present. I wouldn't recommend continuing driving. In my case, it also seemed to affect cold starts and general engine performance, and the engine would misfire. The best advice I can give is to take it to a workshop and have it checked by a professional. They have the tools to accurately diagnose the issue. After changing the unit, the issue was solved.

wolfgangschmid73 (community.author)

You were spot on. Took it to the shop, and it was indeed a defective glow control unit and a corroded connector. 95€ later, all fixed. Thanks for the help!

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RENAULT

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LATITUDE