P0573 – OBD-II DTC

OBD-II DTC P0573 – Cruise Control/Brake Switch A Circuit Low

DTC P0573 meaning

DTC P0573 refers to a problem with the cruise control and brake switch circuit. Specifically, it indicates that the Brake Switch A circuit is reading a low voltage condition. This can affect the vehicle’s cruise control system, as the brake switch is responsible for signaling when the brakes are applied, which should deactivate the cruise control.

DTC P0573 symptoms

Common symptoms associated with DTC P0573 may include:

• Cruise control not functioning properly
• Illuminated check engine light
• Unexpected acceleration or deceleration
• Brake lights not functioning

DTC P0573 causes

Several factors can lead to the occurrence of DTC P0573, including:

• Faulty brake switch
• Wiring issues, such as shorts or open circuits
• Corroded or loose connectors
• Faulty engine control module (ECM)

DTC P0573 seriousness

DTC P0573 can be considered serious because it affects the functionality of the cruise control system. If the cruise control does not deactivate when the brakes are applied, it can lead to unsafe driving conditions. Therefore, it is important to address this issue promptly to ensure safe vehicle operation.

How to diagnose DTC P0573

To diagnose DTC P0573, follow these steps:

1. Use an OBD-II scanner to confirm the DTC and check for any additional codes.
2. Inspect the brake switch for proper operation and alignment.
3. Check the wiring and connectors for damage, corrosion, or loose connections.
4. Test the voltage at the brake switch using a multimeter.
5. Examine the ECM for any faults or updates that may be necessary.

How to fix DTC P0573 step-by-step instructions

To fix DTC P0573, follow these steps:

1. Replace the faulty brake switch if it is not functioning correctly.
2. Repair or replace any damaged wiring or connectors.
3. Ensure all connections are secure and free of corrosion.
4. Clear the DTC using an OBD-II scanner.
5. Test the cruise control system to ensure it operates correctly.

How to erase DTC P0573

To erase DTC P0573, perform the following:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Access the diagnostic menu and select the option to clear or erase codes.
3. Confirm the action and wait for the scanner to complete the process.
4. Disconnect the scanner and take the vehicle for a test drive to ensure the code does not return.

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