xt660x Coolant Problem
I have an issue with my cooling system:
1. The radiator fan does not deploy - at the end of the trip the engine is still running but I can hear the coolant boiling in the radiator.
2. I ran the diagnosis and got an error 21. I have since replaced the coolant sensor and the radiator cap but the problem persists.
3. So far the overheating light has not lit up.
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