P0572 - Understanding DTC P0572: Common Causes and Solutions for Your Vehicle

Quick Answer

P0572 means: DTC P0572 refers to a low voltage condition in the brake switch circuit, affecting cruise control functionality.

Fix: Check and replace faulty components Cost: $100 - $200 Time: 90-180 minutes

Can I drive with P0572? It is advisable to address this issue immediately to ensure safe driving conditions.

Common Questions

What does P0572 mean and how does it affect my car?

DTC P0572 means there's a problem with the brake switch circuit, which can impact your cruise control system. If this code appears, your cruise control may not engage or could disengage unexpectedly when pressing the brake pedal, leading to potential safety issues.

What are the most common causes of P0572 and how much does it cost to fix?

Common causes of P0572 include a faulty brake light switch, damaged wiring, or a malfunctioning ECM. Repair costs typically range from $100 to $200 for a brake light switch replacement, depending on labor rates and parts.

Can I drive my car with P0572 or should I stop immediately?

While you may be able to drive your vehicle, it is not recommended as the cruise control may not function properly. It's best to address the issue promptly to ensure your safety.

How can I diagnose P0572 myself using GeekOBD APP?

Using the GeekOBD APP, you can scan for trouble codes and review freeze frame data to understand the conditions under which the code was triggered. This app allows for real-time monitoring of your vehicle's systems, helping identify if the brake switch is functioning properly.

What vehicles are most commonly affected by P0572?

P0572 is frequently seen in vehicles like the 2014-2018 Ford Fusion and the 2013-2017 Honda Accord, among others. It's advisable to check for any recalls or technical service bulletins related to your make and model.

How can I prevent P0572 from happening again?

To prevent P0572, regularly inspect your brake system and electrical connections for wear and tear. Make sure to address any issues promptly and consider having a professional check the cruise control system during routine maintenance.

What is P0572?

DTC P0572 indicates an issue with the cruise control system, specifically pointing to a problem with the brake switch circuit. When this code is triggered, it means that the vehicle's Engine Control Module (ECM) has detected a low voltage condition in the brake switch circuit. This switch is crucial for ensuring that the cruise control disengages when the brake pedal is pressed. If the brake switch fails, the cruise control may not work correctly, potentially leading to unsafe driving conditions. In practical terms, if you're driving a vehicle such as a 2014-2018 Ford Fusion or a 2013-2017 Honda Accord, you might notice that your cruise control system either doesn't engage or disengages unexpectedly. Ignoring this code can lead to further issues, such as increased wear on the brake system or even unexpected acceleration if the cruise control remains engaged despite pressing the brake pedal. Addressing this code promptly is essential for safe vehicle operation.

System: P - Powertrain (Engine, Transmission, Emissions)

Symptoms

Common symptoms when P0572 is present:

  • The 'Check Engine' light remains illuminated on the dashboard, indicating a fault that needs attention.
  • Cruise control becomes unresponsive or fails to engage, leading to frustration during highway driving.
  • You might experience sudden disengagement of cruise control when pressing the brake pedal, which can be disconcerting.
  • There may be noticeable delays in acceleration when attempting to resume cruise control, affecting driving performance.
  • Unexpected activation of the cruise control system even when the brake pedal is pressed, posing a safety risk.

Possible Causes

Most common causes of P0572 (ordered by frequency):

  1. The most common cause of P0572 is a faulty brake light switch, which can account for approximately 60% of cases. This switch may fail due to wear over time or poor electrical connections.
  2. A second cause could be damaged wiring in the brake switch circuit. This can happen from corrosion or wear and tear, affecting the electrical signals. Checking for frayed wires or loose connections is crucial.
  3. Another potential cause is a malfunctioning ECM; while less common, it can affect how signals are processed. Regular software updates and checks can prevent this.
  4. In rare cases, the issue may stem from the cruise control module itself, which could fail due to internal faults, though this is uncommon.
  5. Lastly, an improper installation of aftermarket cruise control systems can lead to faults in the circuit, making it essential to ensure installations are done correctly.

P0572 Repair Costs

Cost Breakdown by Repair Type

Brake Light Switch Replacement

Replacing the faulty brake light switch is often the most effective way to resolve P0572.

  • Total: $100 - $200
  • Success rate: 90%
Wiring Repair

In cases where wiring issues are detected, repairing or replacing damaged wiring can be necessary.

  • Total: $75 - $150
  • Success rate: 80%
Money-Saving Tips for P0572
  • Start with the most common and least expensive repairs first
  • Use GeekOBD APP to confirm diagnosis before replacing expensive parts
  • Consider preventive maintenance to avoid future occurrences
  • Compare prices for OEM vs aftermarket parts based on your needs
  • Address the issue promptly to prevent more expensive secondary damage

Diagnostic Steps

Professional P0572 Diagnosis Process

Follow these systematic steps to accurately diagnose P0572. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Conduct an initial visual inspection to identify any obvious issues such as damaged wiring, loose connections, or corrosion around the brake switch area (5-10 minutes)

Step 1: Conduct an initial visual inspection to identify any obvious issues such as damaged wiring, loose connections, or corrosion around the brake switch area (5-10 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: Use the GeekOBD APP to perform an OBD2 scan to retrieve all trouble codes and freeze frame data, helping to understand the context of the fault (10-15 minutes)

Step 2: Use the GeekOBD APP to perform an OBD2 scan to retrieve all trouble codes and freeze frame data, helping to understand the context of the fault (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Conduct component testing using a multimeter to check the voltage at the brake switch; ensure it meets specifications (20-30 minutes)

Step 3: Conduct component testing using a multimeter to check the voltage at the brake switch; ensure it meets specifications (20-30 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: Perform a function test of the system to ensure that all components operate correctly after repairs and clear the codes (10-15 minutes)

Step 4: Perform a function test of the system to ensure that all components operate correctly after repairs and clear the codes (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Road test the vehicle under various conditions to confirm that the cruise control system is functioning properly and that the P0572 code does not reappear (15-20 minutes)

Step 5: Road test the vehicle under various conditions to confirm that the cruise control system is functioning properly and that the P0572 code does not reappear (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

Important Notes

  • Always verify the repair with GeekOBD APP after completing diagnostic steps
  • Clear codes and test drive to ensure the problem is resolved
  • Address underlying causes to prevent code recurrence

Real Repair Case Studies

Case Study 1: Brake Switch Replacement on 2015 Ford Fusion

Vehicle: 2015 Ford Fusion, 80,000 miles

Problem: Customer reported that the cruise control would not engage.

Diagnosis: After scanning with the GeekOBD APP, the P0572 code was present. A visual inspection revealed the brake light switch was faulty.

Solution: Replaced the brake light switch, ensuring all connections were secure.

Cost: $150 (including parts and labor)

Result: Cruise control function restored and no further issues reported after a follow-up drive.

Case Study 2: Wiring Repair on 2016 Honda Accord

Vehicle: 2016 Honda Accord, 50,000 miles

Problem: Customer experienced intermittent cruise control issues.

Diagnosis: Diagnostic testing revealed damaged wiring in the brake switch circuit, leading to the P0572 code.

Solution: Repaired the damaged wiring and replaced the connectors.

Cost: $120 (including labor)

Result: Cruise control operated normally post-repair with no recurrence of the code.

Diagnose P0572

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: P0572
System: Powertrain (Engine, Transmission, Emissions)
Severity: HIGH
Category: Engine Codes