OBD II Fault Code

  • OBD II P0C28

OBD-II Code Transmission Control Module (TCM) failure is defined as a AUXILIARY Transmission Fluid Pump Motor Current High

The Auxiliary Transmission Fluid Pump pressurizes the fluid in the transmission. If the pump does not operate as requested, code P0C28 is stored.

Transmission Control Module (TCM) failure Symptoms

  • Vehicle may be immovable

Common Problems That Trigger the P0C28 Code

  • Auxiliary transmission pump failure
  • Drive motor generator power inverter control module failure
  • Transmission Control Module (TCM) failure
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