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Home >> Chevrolet >> 2024 >> Tahoe Commercial, 4WD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 10L80 (MHS MHU MQC) - Diagnostic Information And Procedures (2 Of 2) >> Diagnostic Information and Procedures >> DTC P187D, P187E, P18E7, or P18E8 >> Diagnostic Fault Information

Diagnostic Fault Information

NOTE:
  • DTC P187D, P187E, P18E7, P18E8 will set with a hydraulic/mechanical condition.
  • The components are listed from the least to the most intrusive to service.
Component DTC Condition

Control Valve Body

  • Default Disable Valve
  • Electronic Transmission Range Select (ETRS) Valve
  • Park Servo Valve
  • Reverse to Park (RTP) Blow Off Valve
 P187D, P187E, P18E7, P18E8
  • Binding or Sticking
  • Debris on the component.
  • Mechanically damaged
  • Missing components
M123 Transmission Park Valve Lock Solenoid Actuator/Park Inhibit Solenoid P187D, P187E, P18E7, P18E8
  • Binding or Sticking
  • Debris on the component.
  • Mechanically damaged
  • Missing components
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