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DTC P0A1D: Hybrid/EV Powertrain Control Module

DTC P0A1D: HYBRID/EV POWERTRAIN CONTROL MODULE

Description:  This DTC sets when the TCM detects an internal serial communications error.
Possible Causes: 
  • Software incompatibility issue
  • Damaged TCM
Diagnostic Aids:  Verify the SOBDMC is at the latest calibration level. Clear the SOBDMC DTCs. Repeat the self-test. If the DTC is retrieved again, install a new TCM. Refer to the appropriate Automatic Transmission article. Refer to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) , Programming the TRID Block for a Replacement TCM.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All Refer to the Description, Possible Causes and Diagnostic Aids for the DTC.
Refer to the appropriate articles related to the description, possible causes and diagnostic aids.