AutoCodes – Cadillac – P0573 Cadillac

P0573 Cadillac Code - Brake Switch Circuit High Voltage

Quick Answer

The Brake Pedal Position Sensor signal circuit is a B+ input from the Body Control Module (BCM) to the Engine Control Module (ECM). Common causes include Faulty Brake Pedal Position Sensor, Misadjusted Brake Pedal Position Sensor, Brake Pedal Position Sensor harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0573 Cadillac indicates Brake Switch Circuit High Voltage.
Common causes: Common causes include Faulty Brake Pedal Position Sensor, Misadjusted Brake Pedal Position Sensor, Brake Pedal Position Sensor harness is open or shorted.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 660

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 14, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0573 Cadillac Description

The Brake Pedal Position Sensor signal circuit is a B+ input from the Body Control Module (BCM) to the Engine Control Module (ECM). The BCM and ECM monitor the Brake Pedal Position Sensor signal circuit to detect when the brake pedal has been applied. When the brake pedal is applied, the BCM supplies B+ on the stop lamp signal circuit and also sends a serial data message to the ECM indicating that the brake pedal has been applied. This Diagnostic Trouble Code (DTC) will be set when the ECM detects a short to voltage on the discrete brake signal circuit when the serial data message from the BCM indicates the brakes are not applied. This diagnostic will run when the serial data message and the voltage signal on the brake switch signal circuit do not match for 8 out 10 times, and the condition is present for greater than 2 s.

OBDII Code P0573 Cadillac - Brake Switch Circuit High Voltage - AutoCodes.com — P0573 Cadillac Code - Brake Switch Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0573 Cadillac?

Faulty Brake Pedal Position Sensor
Misadjusted Brake Pedal Position Sensor
Brake Pedal Position Sensor harness is open or shorted
Brake Pedal Position Sensor circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC P0573 Cadillac?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0573 Cadillac code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0573 Cadillac Code

1. What are the common symptoms of OBDII code P0573 in a Cadillac related to the brake switch circuit high voltage?

- Common symptoms include the brake lights staying on continuously, cruise control not working, and the inability to shift out of park.

2. What are the possible causes of OBDII code P0573 in a Cadillac indicating a high voltage in the brake switch circuit?

- The common causes include a faulty brake light switch, a short circuit in the brake light wiring, or a malfunctioning PCM (powertrain control module).

3. How can I diagnose the issue causing OBDII code P0573 in my Cadillac?

- You can start by checking the brake light switch for proper operation, inspecting the wiring for any signs of damage, and using a multimeter to test the voltage in the brake switch circuit.

4. Is it safe to drive my Cadillac with OBDII code P0573 present?

- It is not recommended to drive the vehicle with this code as it can affect important functions like the brake lights and shifting out of park, compromising safety.

5. Can I repair OBDII code P0573 in my Cadillac on my own?

- Depending on your mechanical skills, you may be able to repair this issue on your own by replacing the faulty brake light switch or repairing any damaged wiring.

6. Will resetting the OBDII code P0573 in my Cadillac make the problem go away?

- Resetting the code may temporarily turn off the warning light, but if the underlying issue causing the high voltage in the brake switch circuit is not fixed, the code will likely return.

7. How much does it typically cost to repair OBDII code P0573 in a Cadillac at a dealership or repair shop?

- The cost can vary depending on the specific cause of the issue, but generally, replacing a faulty brake light switch or repairing wiring can range from $100 to $300 at a dealership or repair shop.

8. Can a malfunctioning brake switch affect other systems in my Cadillac besides triggering OBDII code P0573?

- Yes, a faulty brake switch can impact other systems like the cruise control, transmission shifting, and even the vehicle's ability to start in some cases.

9. Are there any preventive measures I can take to avoid encountering OBDII code P0573 in my Cadillac?

- Regularly inspecting and maintaining the brake light switch and wiring can help prevent issues that may lead to the high voltage condition triggering this OBDII code.

10. How long does it usually take to repair OBDII code P0573 in a Cadillac?

- The repair time can vary depending on the exact cause of the issue, but a straightforward repair like replacing the brake light switch typically takes around 1-2 hours.