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Home >> Chevrolet >> 2018 >> Equinox L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 21 (Automatic Transmission - 9T45 (M3U) Or 9T50 (M3D M3H) - Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> DTC P187E, P18AA, P18AB, P18AC, P18AD, P18AE, P27EC Or P27F0: Transmission Park Valve Stuck Off/Transmission Range Control Valve 1-2 Position Switch/Transmission Range Control Enable Valve Stuck Off >> Diagnostic Fault Information

Diagnostic Fault Information

WARNING: This page is about a different variant/trim than selected.
NOTE:

The components are listed from the least to the most intrusive to service.

Component DTC Condition
B280 Automatic Transmission Accumulator Solenoid Valve P18AA - During an autostop event Leaking
Q77D Transmission Control Solenoid Valve 4 P187E, P18AA, P18AB, P18AC, P18AD, P18AE, P27EC, P27F0
  • Binding, sticking or stuck component: Solenoid Valve
  • Damaged or missing component:
    • Retaining Clip
    • Solenoid Valve

Control Valve Body

  • Mode 1 Electronic Transmission Range Selector Valve
  • Electronic Transmission Range Selector Mode Enable Valve/Spring
  • Control Valve Body Spacer Plate
  • Feed Limit Valve/Spring
  • Clutch Selector Valve/Spring
P187E, P18AA, P18AB, P18AC, P18AD, P18AE, P27EC, P27F0
  • Binding, sticking or stuck component: Valve
  • Debris on the component.
  • Damaged component:
    • Valve or Bore - Scored
    • Spring

Control Solenoid Valve Body

  • Mode 2 Electronic Transmission Range Selector Valve
P187E, P18AA, P18AB, P18AC, P18AD, P18AE, P27EC, P27F0
  • Binding, sticking or stuck component: Valve
  • Debris on the component.
  • Damaged component:
    • Valve or Bore - Scored
    • Spring

Automatic Transmission Fluid Pump Body

  • Automatic Transmission Fluid Pump
  • Pressure Regulator Valve
P18AB & P18AD
  • Damaged component: Automatic Transmission Fluid Pump
  • Binding, sticking or stuck component: Valve
  • Debris on the component.
  • Damaged component:
    • Valve or Bore - Scored
    • Spring