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piaphoenix72

MarkX control unit communication error

I have a 2011 Toyota Mark X with a gasoline engine. I'm getting a control unit communication error. Symptoms include engine overheating, check engine light, and coolant spills due to pressure. Suspect a bad cable or plug. Thoughts?

4 comment(s)

lara_fuchs24

Sounds frustrating! I had a similar gremlin with my old Renault Megane. Check engine light, weird sensor readings... turned out to be a corroded connector causing all sorts of chaos. It's like a bad phone line – data gets garbled and the whole system freaks out!

piaphoenix72 (Author)

Corroded connector you say? Where exactly was the issue on your Megane?

lara_fuchs24

On the Megane, it was the data link connector under the dash. Get a car diagnostics ran, it sounds like a wiring issue causing the communication breakdown, like a short circuit. At this point I would take it to your local workshop.

piaphoenix72 (Author)

Thanks, I appreciate the insight. It was indeed a defective plug. Got it repaired for 95€.

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