P0659 Fault Code

Actuator Supply Voltage Circuit High

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

The P0659 fault code indicates a problem with the actuator supply voltage circuit being at a higher voltage than expected. This may lead to improper operation of various actuators in the vehicle, affecting performance and potentially causing issues with driveability.

What are the symptoms of the P0659 code?

Common symptoms associated with the P0659 fault code can include:

• Warning lights illuminated on the dashboard, such as the check engine light
• Unresponsive or poorly functioning actuators (e.g., throttle body, fuel injectors)
• Erratic engine performance, such as stalling or sluggish acceleration
• Difficulty starting the engine or intermittent issues related to electrical components

What causes the P0659 code?

This fault can be caused by several factors, including:

• Short circuits in the actuator supply voltage circuit
• Faulty electrical connections or corroded connectors
• Problems with the powertrain control module (PCM)
• Defective actuators that are drawing excessive current
• Wiring issues such as frayed or damaged wires

How to fix P0659?

To resolve a P0659 fault code, the following steps are generally recommended:

1. Use an OBD-II scanner to confirm the fault code and check for any additional codes that may provide more context.
2. Inspect wiring and connectors for any signs of damage or corrosion, and repair as necessary.
3. Test the voltage at the actuator supply circuit to ensure it is within manufacturer specifications.
4. Replace any faulty actuators that may be causing excessive draw on the circuit.
5. If the problem persists, consider testing or replacing the powertrain control module (PCM).