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Home >> Cadillac >> 2021 >> CT4 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Automatic Transmission - 10L60 (MQA) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P18A8 >> Diagnostic Fault Information

Diagnostic Fault Information

WARNING: This page is about a different variant/trim than selected.
NOTE:
  • DTC P18A8 will set with a hydraulic/mechanical condition.
  • The components are listed from the least to the most intrusive to service.
Component DTC Condition
M123 Transmission Park Valve Lock Solenoid Actuator P18A8 Binding or Sticking/Stuck

Control Valve Body

  • Control Valve Body Spacer Plate
  • Park Servo Valve /Spring
P18A8
  • Oil Channels or Orifices - Blocked by debris/Restricted
  • Valve - Binding or Sticking/Stuck