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OBD II Fault Code

  • OBD II P00B4

    OBD-II Code Cooling fans may stay on all the time is defined as a Radiator Coolant Temperature Sensor Circuit High

    The Radiator Coolant Temperature Sensor tells the engine control module (PCM) the temperature of the coolant in the radiator. When the PCM detects an incorrect signal from the Radiator Coolant Temperature Sensor, the PCM will set code P00B4.

    Cooling fans may stay on all the time Symptoms

    • Cooling fans may stay on all the time

    Common Problems That Trigger the P00B4 Code

    • Powertrain Control Module (PCM) failure
    • Radiator temperature sensor failure
    • Wiring issue
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