P0571 – OBD-II DTC

OBD-II DTC P0571 – Cruise Control Accel Signal Malfunction

DTC P0571 meaning

DTC P0571 refers to a malfunction in the cruise control system, specifically indicating an issue with the acceleration signal. This code is triggered when the Engine Control Module (ECM) detects that the cruise control system is not receiving the expected acceleration signal from the accelerator pedal position sensor or related components.

DTC P0571 symptoms

Common symptoms associated with DTC P0571 may include:

• Inability to engage cruise control
• Erratic or inconsistent cruise control operation
• Check Engine Light illuminated
• Unresponsive accelerator pedal
• Unexpected acceleration or deceleration

DTC P0571 causes

Several factors can lead to the triggering of DTC P0571, including:

• Faulty accelerator pedal position sensor
• Wiring issues or damaged connectors in the cruise control system
• Malfunctioning cruise control module
• Software issues within the ECM
• Vacuum leaks affecting the cruise control actuator

DTC P0571 seriousness

DTC P0571 is considered a moderate to serious issue. While it may not immediately affect the vehicle’s drivability, it can lead to unsafe driving conditions if the cruise control system fails to operate correctly. It is advisable to address this code promptly to ensure safe vehicle operation.

How to diagnose DTC P0571

To diagnose DTC P0571, follow these steps:

• Use an OBD-II scanner to confirm the presence of the code.
• Inspect the accelerator pedal position sensor and its wiring for damage or disconnection.
• Check the cruise control module for any fault codes or malfunctions.
• Test the functionality of the accelerator pedal position sensor using a multimeter.
• Examine the vehicle’s vacuum system for leaks that may affect the cruise control actuator.

How to fix DTC P0571 step-by-step instructions

To fix DTC P0571, follow these step-by-step instructions:

1. Clear the DTC using an OBD-II scanner.
2. Inspect and repair any damaged wiring or connectors related to the accelerator pedal position sensor.
3. Replace the accelerator pedal position sensor if it is found to be faulty.
4. Check and repair any issues with the cruise control module.
5. Fix any vacuum leaks in the system that may affect the cruise control operation.
6. Recheck the system by performing a test drive to ensure the cruise control functions correctly.

How to erase DTC P0571

To erase DTC P0571, follow these steps:

• Connect an OBD-II scanner to the vehicle’s diagnostic port.
• Turn on the ignition without starting the engine.
• Navigate to the “Erase Codes” or “Clear Codes” option on the scanner.
• Confirm the action to clear the DTC from the ECM.
• Disconnect the scanner and start the vehicle to verify that the code does not reappear.

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