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Our automotive experts have put together the following information about the P0C42 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 P0C42 code.

OBD II Fault Code

  • OBD II P0C42

    OBD-II Code High voltage system may not start in cold weather is defined as a Hybrid Battery Pack Coolant Temperature Sensor Circuit

    The hybrid battery pack uses an inlet and outlet coolant temperature sensor to monitor and control the hybrid battery temperature. If one or both of these sensors sends back an implausible signal, code P0C42 is set.

    High voltage system may not start in cold weather Symptoms

    • High voltage system may not start in cold weather

    Common Problems That Trigger the P0C42 Code

    • Battery Energy Control Module (BECM) failure
    • High voltage battery pack coolant temperature sensor failure
    • Wiring issue
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