AutoCodes – Generic – P1574

P1574 Code - ASCD Vehicle Speed Sensor

Quick Answer

The Engine Control Module (ECM) receives two vehicle speed sensor signals via Communication Area Network (CAN) communication line. Common causes include Harness or connectors of the Communication Area Network (CAN) communication line is open or shorted, Combination meter circuit is open or shorted, Faulty Combination meter. 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: P1574 indicates ASCD Vehicle Speed Sensor.
Common causes: Common causes include Harness or connectors of the Communication Area Network (CAN) communication line is open or shorted, Combination meter circuit is open or shorted, Faulty Combination meter.
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 29,474

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 18, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1574 Description

The Engine Control Module (ECM) receives two vehicle speed sensor signals via Communication Area Network (CAN) communication line. One is sent from combination meter, and the other is from TCM (Transmission control module). The ECM uses these signals for Automatic Speed Control Module (ASCD) control.

OBDII Code P1574 - ASCD Vehicle Speed Sensor - AutoCodes.com — P1574 Code - ASCD Vehicle Speed Sensor

What does this mean?

What are the Possible Causes of the DTC P1574?

Harness or connectors of the Communication Area Network (CAN) communication line is open or shorted
Combination meter circuit is open or shorted
Faulty Combination meter
Faulty Vehicle speed sensor
Faulty Transmission Control Module

How to Fix the DTC P1574?

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 P1574 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 P1574 code?

Need more information on how to fix the P1574 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1574 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1574 Buick — Stop Lamp Switch Circuit
P1574 Cadillac — Stop Lamp Switch Circuit
P1574 Chevrolet — Stop Lamp Switch Circuit
P1574 Ford — Stop Lamp Switch Circuit
P1574 GMC — Stop Lamp Switch Circuit
P1574 Infiniti — ASCD Vehicle Speed Sensor
P1574 Nissan — ASCD Vehicle Speed Sensor

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 P1574 Code

1. What are the common symptoms of OBDII code P1574 ASCD Vehicle Speed Sensor?

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

2. What is the main cause of OBDII code P1574 ASCD Vehicle Speed Sensor?

The main cause of this code is a malfunction in the ASCD (Automatic Speed Control Device) vehicle speed sensor.

3. How can I diagnose the ASCD Vehicle Speed Sensor issue causing code P1574?

Diagnosing the issue involves testing the vehicle speed sensor's electrical connections, checking for damage or corrosion, and potentially using a multimeter to measure sensor output.

4. Can a faulty vehicle speed sensor affect other vehicle systems?

Yes, a faulty vehicle speed sensor can affect various systems such as the cruise control, transmission shifting, and ABS operation.

5. Is it safe to continue driving with OBDII code P1574 ASCD Vehicle Speed Sensor active?

It is generally not recommended to drive with this code active, as it can lead to issues with speed-related functions and potentially impact vehicle safety.

6. What are some repair tips for fixing OBDII code P1574 ASCD Vehicle Speed Sensor?

Repair tips include checking and replacing the vehicle speed sensor if necessary, ensuring proper electrical connections, and clearing the code after repairs are completed.

7. Can a DIY enthusiast address OBDII code P1574 ASCD Vehicle Speed Sensor on their own?

Depending on the individual's experience and tools available, DIY enthusiasts may be able to address this code by following diagnostic steps and replacing the faulty components.

8. How much does it typically cost to repair OBDII code P1574 ASCD Vehicle Speed Sensor at a repair shop?

The cost of repairing this code can vary depending on the shop's labor rates, the extent of the issue, and whether any parts need replacement. It's advisable to get estimates from different shops.

9. Are there any preventive measures to avoid OBDII code P1574 ASCD Vehicle Speed Sensor in the future?

Regular maintenance, including checking and cleaning electrical connections, can help prevent issues with the ASCD vehicle speed sensor and potentially avoid triggering this code.

10. Will resetting the OBDII system clear the P1574 ASCD Vehicle Speed Sensor code permanently?

Resetting the system may clear the code temporarily, but if the underlying issue with the ASCD vehicle speed sensor is not addressed, the code is likely to reappear.