P0C74 Possible Causes
- Faulty inverter cooling system
- Inverter cooling system wiring harness is open or short-circuited
- Poor electrical connection of the inverter cooling system circuit
- Inverter water pump assembly
- Power management control ECU
What Does It Mean?
How to Fix Code P0C74
Check the “possible causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
P0C74 Possible Symptoms
Check engine light on (or service engine soon warning light)
P0C74 Meaning
The inverter water pump assembly transmits rotation speed information to the power management control ECU (HV CPU). The power management control ECU (HV CPU) monitors the speed and detects malfunctions.