marco_krueger16
Corolla Overheating and Control Unit Error
Summary of the thread
A 2004 Toyota Corolla is experiencing engine overheating, a check engine light, and coolant leakage, indicating high pressure. Diagnostics suggest a control unit communication error, possibly due to a cable or plug issue. A similar issue was resolved by addressing a connectivity problem related to a software glitch in the control module. It is recommended to have a technician inspect and resolve the issue.
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4 comment(s)
marco_krueger16 (community.author)
Could you give me more details about the connectivity issue you had? Do you remember any specific diagnostic trouble codes?
selinaweiss3
Sure thing. I can't remember the exact code, but it pointed to a data link problem. Honestly, I'm not super tech-savvy. The shop said something about a software glitch messing with the control module. Cost me about 95€ to get sorted. Probably best to get yours checked out.
marco_krueger16 (community.author)
Thanks for the help. That's really useful, and I'll get it checked by a technician soon. Hopefully, it's the same fix.
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TOYOTA
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COROLLA
selinaweiss3
Hey, I drive a Corolla too, and that overheating thing sounds familiar. Did the check engine light throw any codes? I had a similar issue where the engine was running hot, and it turned out to be a connectivity issue somewhere. Might be worth checking those connections you mentioned.