DTC Troubleshooting: P2821
DTC P2821: Line Pressure Solenoid Valve A Stuck ON
NOTE:
Before you troubleshoot, record all freeze data and any on-board snapshot with the HDS, and review the General Troubleshooting Information.
If DTC P2821 is stored in the PCM, engine torque is restricted because of the fail-safe function.

DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P2821 Line Pressure Solenoid Valve A Stuck ON
      

1.
ATF check:

ATF check
?1.
Warm up the engine to normal operating temperature (the radiator fan comes on).

?2.
Make sure that the transmission is filled to the proper level, and check for fluid leaks.

?3.
Drain the ATF through a strainer. Inspect the strainer for metal debris or excessive clutch material.

Does the strainer have metal debris or excessive clutch material?

     
YES
     
     
     
     
NO
     
     
     
Replace the ATF, then go to step 2.
2.
Problem verification:

Problem verification
?1.
Raise the vehicle on a lift, or apply the parking brake, block the rear wheels, and raise the front of the vehicle. Make sure it is securely supported, and allow the front wheels to rotate freely.

?2.
Press the engine start/stop button to select the ON mode.

?3.
Clear the DTC with the HDS.


?4.
Start the engine.

?5.
With the brake pedal pressed, shift to D, then release the brake pedal.

?6.
Monitoring the APP Sensor (%) with the HDS, press (2 % opened) and release (0 % opened) the accelerator pedal every 2 seconds. Then check the Line Pressure Sol VLV. A signal and the Line Pressure Pressure Switch signal with the HDS.
Signal
Current conditions
Values
Unit
APP Sensor (%)
    
Line Pressure Sol VLV. A
    
Line Pressure Pressure Switch
    

Is the Line Pressure Pressure Switch ON when Line Pressure Sol VLV. A is ON, and OFF when Line Pressure Sol VLV. A is OFF?

     
YES
     
     
     
Intermittent failure, the system is OK at this time.?
     
NO
     
     
     
The failure is duplicated. Faulty line pressure solenoid valve A. Replace the secondary valve body (line pressure solenoid valve A).?