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Got the exact same problem yesterday after a hard drive.
Car went into a limp mode without light. Hooked MHD to read codes and got 2EFF.
When i was at idle reading the code, i heard something was grinding, maybe something touched/blocked the fans??
And a minutes or two later, suddenly the orange light of high heat popped on the dash. (The red did not popped).
I stopped engine, cleared the code, restarted the engine, fans blowed a few seconds probably to cool down previous heat and problem was gone, no code and power restored.
What to check ?
I will hook INPA tonight to make the E-BLOWER test and probably i will remove the fan to inspect and also inspect wiring.
I was shocked to read that a fan is 600$ !
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