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Home >> Chevrolet >> 2014 >> Volt >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Electric Converters and Controllers >> Hybrid/EV Control System >> Diagnostic Information and Procedures >> DTC P1E46 or P1E48: 14V Power Module Temperature Sensor 1/2 High Temperature >> Circuit/System Verification
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Circuit/System Verification

  1. Vehicle ON.
  2. Verify DTC P1FF5, P1FF9 or P1FFA is not set.
    • If none of the DTCs are set 
  3. Verify the scan tool Hybrid Powertrain Control Module 2 14V Power Module Fan Speed parameter and actual airflow increase and decrease when commanding the 14V Power Module Fan between 10-90% with a scan tool.
    NOTE: Airflow can be checked by feeling at the output duct in the rear trunk compartment underneath the floor stowage trim panel.
    • If the fan operates properly and airflow is unobstructed 
  4. Verify DTC P1E46 or P1E48 is not set.
    • If any of the DTCs are set 
    1. Program the K1 14V Power Module.
    2. Verify the DTC does not set.
      • If the DTC sets, replace the K1 14V Power Module.
      • If the DTC does not set
    3. All OK.
    • If none of the DTCs are set 
  5. All OK.
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