DTC P0520 Hummer
Control Module. Over Heated
Control Module. Over Heated
Description
The diagnostic trouble code (DTC) is stored if the combustion preheater module (CPM) registers that the temperature in the heater exceeds the permitted value. The heater cannot be activated until the diagnostic trouble code (DTC) has been erased. The diagnostic trouble code (DTC) can only be diagnosed when the combustion preheater module (CPM) is activated.
Cause and Solution
Damaged overheat protection thermostatDamaged engine coolant temperature (ECT) sensorAir or leakage in the cooling systemDamaged water pump.
Video Guide
Diagnostic Info
- DTC Code: P0520
- Brand: Hummer