P0573 Mercedes-Benz Code - Cruise Control/Brake Switch 'A' Circuit High
Quick Answer
When the brake pedal is depressed, the stop light switch sends a signal to the Engine Control Module (ECM). Common causes include Faulty Brake Switch, Brake Switch harness is open or shorted, Brake Switch circuit poor electrical connection. 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 Mercedes-Benz indicates Cruise Control/Brake Switch 'A' Circuit High.
- Common causes
- Common causes include Faulty Brake Switch, Brake Switch harness is open or shorted, Brake Switch circuit poor electrical connection.
- 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.
Code P0573 Mercedes-Benz Description
What are the Possible Causes of the DTC P0573 Mercedes-Benz?
- Faulty Brake Switch
- Brake Switch harness is open or shorted
- Brake Switch circuit poor electrical connection
How to Fix the DTC P0573 Mercedes-Benz?
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 Mercedes-Benz 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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Frequently Asked Questions about P0573 Mercedes-Benz Code
1. What does the OBDII code P0573 mean on a Mercedes-Benz?
P0573 indicates a "Cruise Control/Brake Switch 'A' Circuit High" issue, meaning the brake switch is sending a signal voltage higher than expected.
2. What are the common symptoms of code P0573 in a Mercedes-Benz?
Symptoms may include the cruise control not functioning, brake lights staying on or not working, and the Check Engine Light being illuminated.
3. What causes the P0573 code to appear in a Mercedes-Benz?
Common causes include a faulty brake light switch, damaged wiring or connectors, or a malfunctioning cruise control or brake system module.
4. Can I drive my Mercedes-Benz with the P0573 code active?
While the car may still be drivable, cruise control and brake light issues can pose safety concerns, so it’s recommended to address the issue promptly.
5. How is the P0573 code diagnosed in a Mercedes-Benz?
A technician will use a scan tool to confirm the code, inspect the brake light switch, check for wiring issues, and test the circuit voltage.
6. How do I fix the P0573 code on my Mercedes-Benz?
Repairs may involve replacing the brake light switch, repairing damaged wiring, or resetting the system after addressing the root cause.
7. Can a bad brake light switch cause the P0573 code?
Yes, a faulty brake light switch is one of the most common causes of the P0573 code.
8. What tools are needed to troubleshoot the P0573 code?
Diagnosing this code typically requires an OBDII scanner, a multimeter for voltage testing, and basic tools to inspect and replace components.
9. Does fixing the P0573 code require reprogramming or ECU updates?
In most cases, reprogramming is not needed. However, after repairs, clearing the code with a scan tool may be required.
10. How much does it cost to fix the P0573 code on a Mercedes-Benz?
Repair costs vary, but replacing a brake light switch typically ranges from $50 to $150, including parts and labor. Wiring repairs may cost more depending on complexity.
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