erwin_mayer1
Mokka Overheating Coolant Leak
Summary of the thread
A 2023 Vauxhall Mokka with a gasoline engine is experiencing overheating, a check engine light, and a coolant leak due to excessive pressure. The issue may be linked to a control unit communication error, potentially caused by a bad cable or plug. Suggestions include checking the wiring harness for damage or corrosion, particularly focusing on connectivity issues like the CAN bus or data link. Ultimately, a faulty cable was identified and replaced by a local shop, resolving the problem.
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4 comment(s)
erwin_mayer1 (community.author)
Thanks! Was the problem consistent, or did it come and go? Also, can you tell me exactly where on the wiring harness I should look?
mariomayer76
Mine was pretty consistent once it started. The issue was with the control module. Honestly, I'd take it to a workshop. They can diagnose it properly and stop more damage. Messing with the wiring without knowing what you're doing can make it worse. Better safe than sorry!
erwin_mayer1 (community.author)
Understood. Thanks for the advice! I took it to a local shop, and they found a faulty cable like you thought. They replaced it. The repair was 95€.
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VAUXHALL
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MOKKA
mariomayer76
I had a similar issue with my Mokka, though I don't remember the year. Overheating and coolant leaks aren't good. It sounds like a connectivity problem, maybe the CAN bus or a bad data link. Have you checked the wiring harness for damage or corrosion?