VOLVOUU All Engines (2017 Emissions) Fault Code: P066800 PID: EMS PCM/ECM/TCM Internal Temperature Sensor Circuit Low
This diagnostic trouble code (DTC) is used to indicate temperatures at the engine control module (ECM). The DTC will be set if the ECM temperature is too high. A faulty ECM temperature can lead to power loss.
Conditions for diagnostic trouble code (DTC):
1) Internal fault in electronic control unit (ECU)
Probable cause
1) ECM – Engine Control Module
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