P2721 Fault Code

Pressure Control Solenoid D Control Circuit High

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

The P2721 fault code indicates an issue with the Pressure Control Solenoid D control circuit, specifically that the circuit voltage is higher than the expected range. This component is crucial for managing transmission fluid pressure, ensuring optimal shifting performance and overall transmission function.

What are the symptoms of the P2721 code?

Common symptoms associated with the P2721 code include:

• Rough or erratic shifting of the transmission.
• Possible loss of engine power during acceleration due to incorrect transmission engagement.
• Transmission may go into limp mode, limiting vehicle speed and performance.
• Check Engine Light (CEL) illuminated on the dashboard.

What causes the P2721 code?

This fault can be caused by a variety of issues including:

• Short circuits in the wiring harness leading to the Pressure Control Solenoid D.
• Faulty solenoid that is unable to respond to control signals.
• Poor electrical connections or corroded terminals.
• Malfunctioning Engine Control Module (ECM) that adversely affects solenoid operation.

How to fix P2721?

To resolve the P2721 fault code, you can follow these steps:

• Inspect the wiring and connectors related to the Pressure Control Solenoid D for any damage or corrosion.
• Test the solenoid function to ensure it operates correctly under specified conditions.
• Replace the solenoid if it is found to be faulty.
• Check the ECM for any faults and update it if necessary.
• Clear the fault codes and conduct a road test to verify the issue has been resolved.