P0571 - Understanding DTC P0571: Cruise Control Switch Circuit Malfunction in Common Vehicles

Quick Answer

P0571 means: DTC P0571 refers to a malfunction in the cruise control switch circuit, affecting the cruise control system's operation.

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

Can I drive with P0571? Immediate attention is required to ensure safe driving and prevent further damage.

Common Questions

What does P0571 mean and how does it affect my car?

P0571 indicates a malfunction in the cruise control switch circuit, which can lead to safety risks such as the cruise control not disengaging when brakes are applied. This can affect your vehicle's performance and safety.

What are the most common causes of P0571 and how much does it cost to fix?

Common causes include a faulty brake switch, wiring issues, and a defective cruise control module. Repair costs can range from $100 to $400, depending on the specific issue.

Can I drive my car with P0571 or should I stop immediately?

While you can technically drive your vehicle, it's advisable to address the P0571 code promptly. Driving with a malfunctioning cruise control can lead to unsafe driving conditions.

How can I diagnose P0571 myself using GeekOBD APP?

Using the GeekOBD APP, you can scan for codes, analyze freeze frame data, and monitor real-time parameters to identify the issue causing P0571 effectively.

What vehicles are most commonly affected by P0571?

P0571 is frequently seen in models such as the 2010-2016 Ford Fusion, 2012-2018 Honda Civic, and 2013-2018 Chevrolet Malibu, among others.

How can I prevent P0571 from happening again?

Regular maintenance, including checking the brake switch function and wiring integrity, can help prevent P0571 from recurring. Keeping your vehicle's software updated is also beneficial.

What is P0571?

The diagnostic trouble code (DTC) P0571 indicates a malfunction in the cruise control switch circuit. This code is often triggered when the Engine Control Module (ECM) detects an abnormality in the performance of the cruise control system. The cruise control system is designed to maintain a steady speed without the driver needing to keep their foot on the accelerator. A malfunction could be due to several issues, including a faulty brake switch, a damaged cruise control module, or wiring problems. When this code is present, the vehicle may experience reduced functionality of the cruise control, leading to potential safety concerns. For example, if the cruise control fails to disengage when the brake pedal is pressed, it could result in an accident. Common vehicles affected by this code include the 2010-2016 Ford Fusion and the 2012-2018 Honda Civic. Understanding P0571 is crucial for maintaining your vehicle's performance and safety, as ignoring this code could lead to more significant issues down the road.

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

Symptoms

Common symptoms when P0571 is present:

The check engine light illuminates, indicating a fault with the cruise control system.
Cruise control fails to engage or disengage properly, causing potential safety issues while driving.
Difficulty in maintaining a consistent speed, as the cruise control may not function at all or inconsistently.
Unusual behavior of the accelerator pedal, where it may feel unresponsive or overly sensitive when attempting to use cruise control.
Increased fuel consumption due to the inability to utilize cruise control effectively on highways.

Possible Causes

Most common causes of P0571 (ordered by frequency):

Faulty brake switch - This is the most common cause, accounting for approximately 40% of P0571 cases. If the brake switch is malfunctioning, it may not signal the ECM correctly when the brake is applied, leading to cruise control issues.
Wiring issues - Damaged or corroded wiring in the cruise control circuit can prevent proper communication between components, contributing to the error code.
Defective cruise control module - This component can fail due to wear or manufacturing defects, resulting in a P0571 code.
Faulty accelerator pedal position sensor - If this sensor provides incorrect readings, it could mislead the ECM, affecting cruise control functionality.
Less common cause - Software glitches in the ECM may also trigger this code, though this is rare and usually resolved with a software update.

P0571 Repair Costs

Cost Breakdown by Repair Type

Brake Switch Replacement

Replacing the faulty brake switch to restore proper signaling to the ECM.

Total: $100 - $200
Success rate: 90%

Cruise Control Module Repair

Repairing or replacing the cruise control module if found defective.

Total: $200 - $400
Success rate: 85%

Money-Saving Tips for P0571

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 P0571 Diagnosis Process

Follow these systematic steps to accurately diagnose P0571. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion in the cruise control circuit (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion in the cruise control circuit (5-10 minutes).