AutoCodes – Mazda – P0574 Mazda

P0574 Mazda Code - Cruise Control System Vehicle Speed Too high

Quick Answer

The Engine Control Module (ECM) monitors the Cruise Control System. Common causes include Faulty vehicle speed signal, Vehicle overspeed condition. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: P0574 Mazda indicates Cruise Control System Vehicle Speed Too high.
Common causes: Common causes include Faulty vehicle speed signal, Vehicle overspeed condition.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 3,594

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 28, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0574 Mazda Description

The Engine Control Module (ECM) monitors the Cruise Control System. The ECM sets the OBDII code when the Cruise Control System is not to factory specifications.

OBDII Code P0574 Mazda - Cruise Control System Vehicle Speed Too high - AutoCodes.com — P0574 Mazda Code - Cruise Control System Vehicle Speed Too high

What does this mean?

What are the Possible Causes of the DTC P0574 Mazda?

Faulty vehicle speed signal
Vehicle overspeed condition

How to Fix the DTC P0574 Mazda?

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 P0574 Mazda 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 P0574 Mazda code?

Need more information on how to fix the P0574 Mazda code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0574 Mazda code diagnosed by a professional: Find a repair shop in your area

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 P0574 Mazda Code

1. What does the OBDII code P0574 mean on a Mazda?

P0574 indicates an issue with the cruise control system where the vehicle's speed is detected to be too high, potentially caused by a malfunction in the cruise control input or related components.

2. What are common symptoms of the P0574 code in a Mazda?

Symptoms include the cruise control not functioning, the cruise control light flashing, or being unable to maintain a set speed.

3. What causes the P0574 code to appear on a Mazda?

Common causes include a faulty cruise control switch, damaged speed sensor, wiring issues in the cruise control system, or a malfunction in the engine control module (ECM).

4. Can I still drive my Mazda with the P0574 code?

Yes, you can usually drive the vehicle, but the cruise control functionality may be disabled, and the issue should be diagnosed and repaired to avoid further complications.

5. How do I diagnose the P0574 code on a Mazda?

Start by checking the cruise control switch and speed sensor for proper operation, inspecting related wiring and connectors for damage, and using a scan tool to monitor live data from the system.

6. How can I fix the P0574 code on my Mazda?

Repairs could include replacing a faulty cruise control switch, repairing damaged wiring, replacing a defective speed sensor, or updating/reprogramming the ECM if needed.

7. Is the P0574 code specific to Mazda vehicles?

No, the P0574 code is a generic OBDII code and can appear in vehicles of other makes, but the diagnosis and repair steps may vary slightly depending on the manufacturer.

8. Can a faulty brake light switch cause the P0574 code in a Mazda?

Yes, a malfunctioning brake light switch can interfere with the cruise control system and trigger the P0574 code.

9. Will clearing the P0574 code fix the problem permanently?

Clearing the code may temporarily remove the error from the system, but the underlying issue must be resolved to prevent the code from returning.

10. How much does it cost to repair the P0574 code on a Mazda?

The cost depends on the root cause, ranging from $50 to $200 for minor fixes like a switch replacement, and higher if more extensive repairs are required.