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Home >> Subaru >> 2020 >> Crosstrek Base, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 14 (P-HEV Drive Motor System (Diagnostics)) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0A78-9E: Drive Motor "A" Inverter Stuck On >> General Description >> Overview Of Error

Overview Of Error

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This indicates that large current flew to the motor converter. The following cases are assumed to be causes of this symptom.

Part Main trouble contents
Transmission assembly
  • Short or open circuit of motor coil
  • Malfunction inside motor (damages caused by iron powder and foreign matter)
Resolver Open or short circuit of Motor resolver
Inverter
  • Inverter inner circuit malfunction
  • Malfunction of control module that controls inverter
  • Inverter controlling sensor malfunction (current sensor, voltage sensor (VH and VL), etc.)
Cooling System
  • Malfunction of Inverter water pump
  • Leakage of coolant
  • Freezing of coolant
  • Clogging in coolant passage