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melinaherrmann4

CrosslandX preheating lamp and check engine light

Having trouble with my 2018 Vauxhall CrosslandX diesel. It's got 131052 km on the clock. The preheating lamp simply refuses to switch off, and the check engine light is on. There's also a puff of smoke when I accelerate. I suspect a defective preheating control unit, potentially a dodgy cable or plug connection. Anyone else encountered anything similar?

Summary of the thread

A 2018 Vauxhall CrosslandX diesel exhibited issues with the preheating lamp not turning off, the check engine light being on, and smoke during acceleration. The suspected cause was a defective preheating control unit or faulty connections. After diagnostic checks and advice, it was found that a corroded connector on the preheating control unit was the problem. Cleaning the connector resolved the issue.

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4 comment(s)

lindaheld2

I've experienced almost identical symptoms with my CrosslandX. The preheating lamp issue, accompanied by the check engine light and smoke upon acceleration, strongly suggests a problem within the heating module or associated electronics. Did you perform any diagnostic steps, such as checking the fault codes via OBD?

melinaherrmann4 (community.author)

Yes, I used an OBD reader, and it pointed towards the preheating unit. I am curious, was it definitively the control unit itself, or did you identify a specific wiring fault or connector issue? Any details you can share would be helpful before I start replacing parts.

lindaheld2

In my case, the issue was indeed within the control unit itself, but it was triggered by a loose connection. I suggest taking it to the workshop before replacing the unit to make sure that there is no problems with the connection.

melinaherrmann4 (community.author)

Thanks for the insight. I followed your advice and took it to a local garage. Turns out it was a corroded connector on the preheating control unit, just as we suspected. Cleaned it up, and everything's back to normal. Total cost: 95€ Appreciate the help!

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VAUXHALL

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CROSSLANDX