P0596 Fault Code

Cruise Control Servo Control Circuit High

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

The P0596 fault code indicates an issue with the cruise control servo control circuit being too high. This means that the electronic system responsible for managing the speed control feature of the vehicle is experiencing higher than expected voltage levels.

• The cruise control system allows the driver to maintain a constant speed without needing to keep their foot on the accelerator.
• The servo control circuit is a critical part of this system, managing the throttle position to maintain speed.
• A problem in this circuit can lead to insufficient or excessive throttle input, making it dangerous while driving.

What are the symptoms of the P0596 code?

If the P0596 code is present, drivers may experience:

• Cruise control system not activating or disengaging unpredictably.
• A warning light on the dashboard indicating a problem with the cruise control.
• Inconsistent acceleration, leading to difficulty maintaining speed.
• A feeling of increased responsiveness from the throttle.

What causes the P0596 code?

Several factors can lead to a P0596 fault code including:

• Faulty cruise control servo motor sending erroneous voltage signals.
• Damaged or shorted wiring in the servo control circuit.
• Poor electrical connections causing intermittent issues.
• Malfunctioning engine control module (ECM) failing to interpret data correctly.

How to fix P0596?

To resolve a P0596 fault code, follow these steps:

• Begin with a thorough inspection of the cruise control system's wiring and connectors for damage or corrosion.
• Test the cruise control servo motor to ensure it is functioning correctly, as it may need replacement.
• Check the voltage levels in the control circuit to identify if they are within manufacturer specifications.
• If all hardware checks out, consider inspecting or reprogramming the engine control module (ECM) for potential software issues.