P0963 - PRESSURE CONTROL (PC) SOLENOID A -CONTROL CIRCUIT HIGH

The proper performance of an automatic transmission is highly dependent on the shifts performed by the clutches and belts. Efficient shifting requires accurate transmission of fluid pressure, and to achieve this, pressure control solenoids are used to send fluid pressure to the clutches and belts.

The internal pressure of the pressure control solenoids is monitored as well as the operation of the solenoids to ensure that they are functioning correctly. If excessively high voltages are detected in the Pressure Control Solenoid A circuit after one of these tests, the fault code P0963 OBDII will be stored.

• Check Engine lamp comes on.
• Increased fuel consumption.
• Increased transmission temperatures or incorrect transmission performance.

DTC P0963 OBD2 is set by the following:

• The transmission fluid may have contamination or a very low level.
• There may be obstructions in the transmission filter.
• Hydraulic passages may be blocked.
• Pressure Control Solenoid A circuit wires or connections may be in poor condition.
• Pressure Control Solenoid A may be defective.

To troubleshoot the P0963 OBDII diagnostic code consider the following:

• Consult the TSB.
• Check for transmission fluid leaks or contamination. If you discover one of these conditions, proceed with the pertinent corrective actions.
• Verify that the transmission filter and hydraulic passages are not clogged. If any blockage is found, make the appropriate adjustments.
• Inspect the wiring and connections of the Pressure Control Solenoid A circuit and verify that they are not damaged by corrosion or burns. If such damage is found, make repairs as required.
• Take readings of the resistance of the Pressure Control Solenoid A and check if the result matches the vehicle specifications. If the resistance is poor, the solenoid may be damaged and should be replaced.