dennisschulze78
Lexus IS Hybrid Overheating
Summary of the thread
A 2017 Lexus IS hybrid experienced overheating, a check engine light, and coolant spilling due to overpressure. The suspected cause was a control unit communication error, possibly from a defective cable or plug connection. Diagnostic trouble codes confirmed a communication error, leading to the identification of a defective plug connection to the engine control unit. Repairing this connection resolved the issue.
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4 comment(s)
dennisschulze78 (community.author)
Yes, DTC points to a control unit communication error. Wiring issue suspected. Could you elaborate on the specifics of your similar experience? Which control unit was affected?
marvinstern1
Ah, a communication error, that's very similar to what I experienced. Honestly, I'm not entirely certain which specific module was causing it in my car. I'd recommend getting the car to a qualified workshop to properly diagnose the root cause. Intermittent faults in these hybrid systems can be tricky.
dennisschulze78 (community.author)
Understood. Root cause was a defective plug connection to the engine control unit. Repair cost 95€. Issue resolved.
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LEXUS
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IS
marvinstern1
I have a Lexus IS too, and your symptoms sound awfully familiar. The check engine light and coolant issues are concerning. Have you checked for any specific diagnostic trouble codes (DTCs) related to the hybrid control module? A generic OBD2 scanner might give you some insight.