P1572 – OBD-II DTC

OBD-II DTC P1572 – Speed Control Command Switch Out of Range High

DTC P1572 meaning

DTC P1572 refers to a diagnostic trouble code indicating that the speed control command switch is out of range high. This code is triggered when the Engine Control Module (ECM) detects that the input from the speed control switch exceeds the expected range. The speed control command switch is responsible for controlling the vehicle’s cruise control system, and an out-of-range signal can affect the operation of this system.

DTC P1572 symptoms

Common symptoms associated with DTC P1572 may include:

• Cruise control not functioning properly
• Inability to set or maintain speed with cruise control
• Illumination of the check engine light
• Erratic behavior of the cruise control system

DTC P1572 causes

Several factors can lead to the triggering of DTC P1572, including:

• Faulty speed control command switch
• Wiring issues, such as shorts or open circuits
• Corroded or damaged connectors
• Faulty Engine Control Module (ECM)
• Software issues within the ECM

DTC P1572 seriousness

The seriousness of DTC P1572 can vary. While it may not pose an immediate safety risk, it can lead to a malfunctioning cruise control system, which can be inconvenient and potentially dangerous if the driver relies on cruise control. It is advisable to address this code promptly to ensure proper vehicle operation.

How to diagnose DTC P1572

To diagnose DTC P1572, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P1572 code.
2. Inspect the speed control command switch for physical damage or wear.
3. Check the wiring and connectors associated with the speed control system for any signs of corrosion or damage.
4. Test the speed control command switch using a multimeter to ensure it operates within the specified range.
5. Examine the ECM for any software updates or faults.

How to fix DTC P1572 step-by-step instructions

To fix DTC P1572, follow these steps:

1. Repair or replace any damaged wiring or connectors related to the speed control system.
2. If the speed control command switch is faulty, replace it with a new one.
3. Clear any stored trouble codes using an OBD-II scanner.
4. Test the cruise control system to ensure it operates correctly after repairs.
5. If the issue persists, consider reprogramming or replacing the ECM.

How to erase DTC P1572

To erase DTC P1572, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the option to clear or erase trouble codes on the scanner.
4. Confirm the action to erase the codes.
5. Disconnect the scanner and start the vehicle to check if the code reappears.

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