DTC P0776 or P0777
Diagnostic InstructionsDTC Descriptor
DTC P0776

Pressure Control Solenoid Valve 2 Stuck Off

DTC P0777

Pressure Control Solenoid Valve 2 Stuck On

Diagnostic Fault Information

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

Component

DTC

Condition

Q8 Control Solenoid Valve Assembly

P0776, P0777

  • Q27B Pressure Control Solenoid Valve 2—Binding or Sticking/Stuck
  • Control Solenoid Valve Assembly Filter Plate—Blocked by debris/RestrictedorCracked
  • O-Ring—Leaking

Control Valve Body

P0776, P0777

  • Clutch Regulator Valve—Binding or Sticking/Stuck
  • Control Valve Body Ball Check Valve—LeakingorBlocked by debris
  • Oil Channels or Orifices—Blocked by debris/Restricted

Control Valve Body Spacer Plate

P0776

Oil Channels or Orifices—Blocked by debris/Restricted

Control Valve Channel Plate

P0776

Oil Channels or Orifices—Blocked by debris/Restricted

3-5-R and 4-5-6 Clutch Housing Assembly

P0776

  • 3-5-R Clutch Backing Plate Retaining Ring—Not seated correctly
  • 3-5-R clutch plates worn or damaged.
  • Clutch Housing—Scored/Worn
  • Clutch Piston
    • Cracked
    • Damaged seal.

Torque Converter with Fluid Pump Housing Assembly

P0776, P0777

  • Oil Pump Drive Gear—Worn
  • Oil Pump Driven Gear—Worn
  • Transmission Fluid Pump Housing—Scored/Worn
Circuit/System Description

For an overview of the component/system, refer to:

The solenoid valve controls fluid pressure to the 3-5-R regulator valve that controls the fluid pressure to the 3-5-R clutch.

DTC P0776, P0777 will set with a hydraulic/mechanical condition.

Conditions for Running the DTC
  • DTC P0101–P0103, P0106–P0108, P0171, P0172, P0174, P0175, P0201–P0208, P0300–P0308, P0401, P042E, P0716, P0717, P0722, P0723, P182E = Not set
  • { P0777 }3-5-R Clutch=Commanded Off—For greater than 2 s
  • Accelerator Pedal Position=Greater than 0.5%
  • Accelerator pedal position signal = Valid
  • Engine Speed=400 to 7,500 RPM—For greater than 5 s
  • { P0776 }Gear Command=3rd Gearor5th Gear—For greater than 3 s
  • { P0777 }Gear Command=1st Gearor2nd Gearor4th Gearor6th gear
  • High Side Driver=Enabled
  • Ignition Voltage=9 to 32 V
  • Transmission Fluid Temperature=Warmer than −6.6°C (20.1°F)
  • Transmission Output Speed=Greater than 100 RPM

Frequency the DTC runs=Continuously—After the running conditions are met

Conditions for Setting the DTCP0776

3-5-R Clutch=Not applied

The above condition(s) must occur 3 times.

P0777

3-5-R Clutch=Not released

The above condition(s) must occur 3 times.

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor category=Type A DTC—Additional actions taken:

  • Grade braking=Disabled
  • Line Pressure Command=Maximum
  • Manual Shift Control=Disabled
  • { If equipped }Mode Switch=Disabled
  • { If equipped }Neutral Idle Mode=Disabled
  • Powertrain braking=Disabled
  • Transmission Adaptive Pressure Control=Freeze current adapt values
  • { P0776 }Transmission gear allowed=2nd GearorNeutral
  • { P0777 }Transmission gear allowed=3rd Gear
Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor category=Type A DTC

Reference Information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References

Circuit/System Verification
  1. Verify the condition does not exist:Incorrect fluid level or condition»Refer to:Transmission Fluid Level and Condition Check
    • If a condition exists

      Repair or replace as necessary

    • If no condition exists
  2. Ignition » On / Vehicle » In Service Mode
  3. Clear the DTCs.
  4. Road test the vehicle.»Refer to:Road Test

    Verify DTC P0716, P0717, P0722, P0723 is not set

    • If none of the DTCs are set
  5. Verify DTC P0776, P0777 is not set
    • If DTC P0776 or P0777 is set

      Refer to:Circuit/System Testing

    • If none of the DTCs are set
  6. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

    Verify the DTC does not set.

    • If the DTC sets

      Refer to:Circuit/System Testing

    • If the DTC is not set
  7. All OK.
Circuit/System Testing
  1. Verify the condition does not exist:Incorrect pressure»Refer to:Line Pressure Check&Solenoid Valve Pressure
    • If no condition exists
  2. Ignition/Vehicle » Off
  3. Remove the component:Q8 Control Solenoid Valve Assembly
  4. Verify the procedure/test passes.»Refer to:Control Solenoid Valve and Transmission Control Module Assembly Inspection
    • If the procedure/test does not pass

      Replace the component:Q8 Control Solenoid Valve Assembly

    • If the procedure/test passes
  5. Refer to:Diagnostic Fault Information
Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair:Diagnostic Repair Verification