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Home >> GMC >> 2019 >> Terrain SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 360 (Automatic Transmission - 10L60 (MQA) Or 10L80 (MHU) - Diagnostic Information And Procedures (2 Of 2)) >> Diagnostic Information and Procedures >> DTC P18AE >> Diagnostic Fault Information

Diagnostic Fault Information

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • DTC P18AE will set with a hydraulic/mechanical condition.
  • The components are listed from the least to the most intrusive to service.
Component DTC Condition
Q77J Transmission Control Solenoid Valve 9 P18AE
  • Binding or Sticking
  • Mechanically damaged
  • Missing components
  • Line Enable Anti-Backflow Valve
  • Valve Spring
  • Valve Body Bore
 P18AE
  • Binding or Sticking
  • Debris on the component.
  • Mechanically damaged
Control Valve Body P18AE Fluid/oil passage - Restricted/Leaking
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