lisa_knight6
Fortuner Overheating and Coolant Spill
Summary of the thread
A 2012 Toyota Fortuner diesel was experiencing overheating, a check engine light, and coolant spills. The issue was suspected to be a control unit communication error, potentially caused by a CAN bus issue or faulty sensor. After scanning, a generic control module communication error was identified, and it was suggested that a defective cable or plug connection could be the cause. The problem was resolved by replacing a corroded connector on a sensor, which fixed the issues.
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4 comment(s)
lisa_knight6 (community.author)
I scanned it and got a code related to a generic control module communication error. Could a defective cable or plug connection really cause all these problems, like the overheating and coolant spill?
davidfrank2
Yes, a defective cable or plug connection on a critical sensor can absolutely wreak havoc, leading to misreporting and cascading failures. Best to get the wiring and connectors checked out thoroughly, or head to a workshop.
lisa_knight6 (community.author)
I took it to the shop, and it turned out to be a corroded connector on one of the sensors, just like you suspected. New connector and cleaning fixed it, total cost 95€.
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TOYOTA
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FORTUNER
davidfrank2
Sounds like a potential CAN bus issue or a faulty sensor sending incorrect data to the ECU. Have you scanned for any diagnostic trouble codes (DTCs)? A connectivity issue might trigger those symptoms.