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Our automotive experts have put together the following information about the P0C74 diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P0C74 code.

OBD II Fault Code

  • OBD II P0C74

    OBD-II Code High voltage control module failure is defined as a Motor Electronics Coolant Pump "B" Control Performance

    The Inverter/Converter Assembly has its own water pump for its cooling system. This water pump is electronically controlled and monitored by the Power Management Control Module (HV CPU). If the HV CPU detects failure of the water pump, code P0C74 will be set.

    High voltage control module failure Symptoms

    • High voltage system temperature light may be illuminated

    Common Problems That Trigger the P0C74 Code

    • High voltage control module failure
    • Inverter/converter water pump failure
    • Wiring issue
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