AutoCodes – Generic – C1572

C1572 Code - Vehicle Speed Signal Malfunction

Quick Answer

The Power Steering ECU receives vehicle speed signals from the Skid Control ECU via CAN communication. Common causes include Faulty Vehicle Speed Sensor, Vehicle Speed Sensor harness is open or shorted, Vehicle Speed Sensor circuit poor electrical connection. 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 Vehicle Speed Sensor, Vehicle Speed Sensor harness is open or shorted, Vehicle Speed Sensor circuit poor electrical connection.
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.

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Code Popularity 3,427

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 05, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1572 Description

The Power Steering ECU receives vehicle speed signals from the Skid Control ECU via CAN communication. The ECU provides appropriate assisting force in accordance with the vehicle speed, based on the signals. If the ECU detects this Diagnostic Trouble Code (DTC), it adjusts the amount of power assistance for a speed of 100 km/h (62 mph) and continues the system control. The Power Steering ECU monitors the Vehicle Speed Signal. The Power Steering ECU sets the OBDII code when the Vehicle Speed Signal is not to factory specifications.

OBDII Code C1572 - Vehicle Speed Signal Malfunction - AutoCodes.com — C1572 Code - Vehicle Speed Signal Malfunction

What does this mean?

What are the Possible Causes of the DTC C1572?

Faulty Vehicle Speed Sensor
Vehicle Speed Sensor harness is open or shorted
Vehicle Speed Sensor circuit poor electrical connection
Faulty Skid Control ECU
Faulty Power Steering ECU

How to Fix the DTC C1572?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1572 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the C1572 code?

Need more information on how to fix the C1572 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1572 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1572 Lexus — Vehicle Speed Signal Malfunction
C1572 Scion — Vehicle Speed Signal Malfunction
C1572 Toyota — Vehicle Speed Signal Malfunction

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.