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Engine-Codes – Generic – C1572

C1572 Code - Vehicle Speed Signal Malfunction

Quick Answer

The C1572 diagnostic trouble code (DTC) indicates a malfunction in the vehicle speed signal. Common causes include Faulty wheel speed sensors, Malfunctioning vehicle speed sensor, Issues with the transmission output speed sensor. 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
C1572 indicates Vehicle Speed Signal Malfunction.
Common causes
Common causes include Faulty wheel speed sensors, Malfunctioning vehicle speed sensor, Issues with the transmission output speed sensor.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code C1572 Description

The C1572 diagnostic trouble code (DTC) indicates a malfunction in the vehicle speed signal. This code is often triggered when the vehicle's onboard computer detects an inconsistency or loss of signal from one or more components responsible for providing speed data to the system. The vehicle speed signal is crucial for various systems in modern vehicles, including the engine control module, transmission control module, and antilock braking system. When this signal is compromised, it can lead to a range of performance issues and potentially affect the overall safety and drivability of the vehicle.

OBDII Code C1572 - Vehicle Speed Signal Malfunction
C1572 Code - Vehicle Speed Signal Malfunction

Common Causes of C1572

  1. Faulty wheel speed sensors
  2. Malfunctioning vehicle speed sensor
  3. Issues with the transmission output speed sensor
  4. Wiring or connector problems in the speed signal circuit
  5. Faulty engine control module or transmission control module

Symptoms of C1572

  1. Inaccurate speedometer readings or fluctuations
  2. Erratic shifting behavior from the transmission
  3. Traction control system activation without reason
  4. Check engine light illumination

How to Fix C1572

  1. Begin by connecting a diagnostic scanner to the vehicle's onboard computer to retrieve the specific trouble codes and confirm that C1572 is present.
  2. Inspect the wheel speed sensors, vehicle speed sensor, and transmission output speed sensor for any signs of damage or wear. Replace any faulty sensors as needed.
  3. Check the wiring harness and connectors in the speed signal circuit for any breaks, corrosion, or loose connections. Repair or replace damaged components.
  4. Clear the trouble codes from the system using the diagnostic scanner and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnostic testing may be required to pinpoint the exact cause of the malfunction.

Cost to Fix C1572

The typical repair costs for addressing a vehicle speed signal malfunction can vary depending on the specific cause of the issue and the labor rates in your area. In general, replacing a faulty sensor or repairing wiring issues can range from $100 to $300, including parts and labor. However, more complex problems that require module replacement or extensive diagnostic testing may increase the total repair costs. It's advisable to consult with a professional mechanic to receive an accurate estimate based on your vehicle's make and model. Keep in mind that labor rates at auto repair shops can vary widely, so it's recommended to shop around for the best rates in your area.

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Code C1572 Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C1572 Code

1. What are the common symptoms of OBDII code C1572 - Vehicle Speed Signal Malfunction?

The common symptoms include erratic speedometer readings, cruise control issues, and the illumination of the Check Engine Light.

2. What are the possible causes of OBDII code C1572?

Possible causes for this code include faulty vehicle speed sensor, damaged wiring or connectors in the speed sensor circuit, or a malfunctioning instrument cluster.

3. How can I diagnose the cause of OBDII code C1572?

Diagnosing this code involves visually inspecting the speed sensor and its wiring, testing the sensor's output using a multimeter, and checking the signal at the instrument cluster.

4. Can a bad vehicle speed sensor cause OBDII code C1572?

Yes, a faulty vehicle speed sensor is a common cause of the Vehicle Speed Signal Malfunction code C1572.

5. How important is it to address OBDII code C1572 promptly?

It is important to address this code promptly as it can affect the accuracy of your speedometer, cruise control functionality, and overall vehicle performance.

6. Are there any DIY repair tips for fixing OBDII code C1572?

DIY repair tips include checking and cleaning the speed sensor connectors, inspecting the sensor for physical damage, and ensuring the wiring is intact.

7. Can a disconnected speedometer cable cause OBDII code C1572?

A disconnected speedometer cable is not typically the cause of OBDII code C1572 as modern vehicles use electronic speed sensors instead of mechanical cables.

8. Will OBDII code C1572 prevent my vehicle from passing an emissions test?

The Vehicle Speed Signal Malfunction code C1572 is not directly related to emissions, but it can still cause your vehicle to fail an emissions test if left unresolved.

9. Is it safe to continue driving with OBDII code C1572 present?

While it may be safe to drive with this code present, it is not recommended as it can lead to inaccuracies in speed readings and potential issues with your vehicle's performance.

10. Can resetting the OBDII code C1572 clear the issue permanently?

Resetting the code may temporarily clear the Check Engine Light, but if the underlying issue causing the code is not addressed, it is likely to reappear.

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