P0963 Fault Code

Pressure Control Solenoid A Control Circuit High

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0963 fault code indicates that there is an issue with the pressure control solenoid A control circuit being too high. This solenoid is essential for controlling the hydraulic pressure within the transmission, ensuring that it operates correctly. When this fault code is triggered, it suggests that the voltage or signal sent to the solenoid exceeds the normal range, potentially leading to transmission problems.

What are the symptoms of the P0963 code?

When the P0963 code is present, you may notice several symptoms related to the vehicle's transmission performance, including:

• Slipping or harsh shifting during gear changes
• Delayed engagement when shifting from park to drive
• Warning lights or alerts on the dashboard, particularly the check engine light
• Decreased acceleration or overall power from the vehicle.

What causes the P0963 code?

The high voltage in the pressure control solenoid A circuit can be caused by multiple factors, including:

• A short circuit in the wiring harness
• A faulty pressure control solenoid A
• Poor electrical connections or corrosion at the connectors
• Malfunctioning transmission control module (TCM)
• Issues with other related components such as the valve body.

How to fix P0963?

To resolve the P0963 code and ensure proper operation of the transmission, follow these steps:

1. Conduct a thorough diagnostics check using an OBD-II scanner to confirm the fault code.
2. Inspect the wiring and connectors for damage, wear, or corrosion; repair or replace as needed.
3. Test the pressure control solenoid A with a multimeter to ensure it operates within the manufacturer's specifications.
4. If the solenoid is found to be faulty, replace it with a new part.
5. Clear the fault codes and perform a road test to verify that the issue has been resolved.