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georgjung1

Astra Overheating Check Engine Light

I'm having a nightmare with my 2007 Vauxhall Astra (gasoline engine). It's been overheating like crazy, and the check engine light keeps popping on. I even noticed coolant leaking under the car – seems like way too much pressure in the system. Could this be related to a control unit communication error?

4 comment(s)

mats_jones75

Overheating, check engine light, and coolant leak… that sounds rough. A control unit error could be the culprit, but those symptoms can stem from a bunch of things. Has the car been diagnosed? What codes is it throwing?

georgjung1 (Author)

Yeah, ran a car diagnostics, and it flagged a control unit communication error. They're saying it's likely a faulty cable or plug connection on the component, but I'm not sure what they mean by that. What component are they talking about? And could a bad connection really cause all these problems?

mats_jones75

A bad connection in the CAN bus system can definitely wreak havoc and trigger those symptoms. If the diagnostic pointed to a comms error and they suspect a dodgy connection, it's worth checking all the relevant wiring and connectors related to the control modules. Though, with those symptoms, it may be time to visit a workshop and let them trace the cables for you.

georgjung1 (Author)

It was indeed a faulty connection, which caused the control unit communication error and all those issues. Paid 95€ and everything seems to be fine now. Cheers!

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