P0573 Fault Code

Cruise Control/Brake Switch A Circuit High

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

The P0573 fault code indicates a problem with the Cruise Control/Brake Switch A circuit being high. This means that the vehicle's computer has detected a voltage level higher than expected from the brake switch. This switch plays a crucial role in ensuring that the cruise control system operates correctly and safely. If the circuit is high, it may cause issues with cruise control engagement or disengagement.

What are the symptoms of the P0573 code?

Common symptoms associated with the P0573 code include:

• Cruise control not functioning properly, either not engaging or disengaging unexpectedly.
• Illuminated check engine light on the dashboard.
• Erratic behavior of the cruise control system, with fluctuations in speed.
• Potentially, the inability to use the cruise control feature at all.

What causes the P0573 code?

Several factors can lead to a P0573 code, including:

• A faulty brake switch that is stuck in a 'closed' position.
• Damaged or frayed wiring in the brake switch circuit.
• Poor electrical connections or corrosion affecting the brake switch.
• Issues with the cruise control module that may lead to erroneous signals.
• Incorrectly installed or defective aftermarket components that affect the brake system.

How to fix P0573?

To resolve the P0573 fault code, the following steps are generally recommended:

• Inspect the brake switch for any signs of failure or damage, and replace it if necessary.
• Check the wiring and connectors for any signs of wear, shorts, or corrosion, and repair or replace as needed.
• Ensure that no aftermarket components are interfering with the cruise control system.
• Clear the fault code after repairs, and test the cruise control system to ensure it is functioning correctly.