AutoCodes – Ford – C0040 Ford

C0040 Ford Code - Brake Pedal Switch 'A' Signal Plausibility Failure

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the Brake Pedal Switch 'A'. Common causes include Faulty Brake Pedal Switch 'A', Brake Pedal Switch 'A' harness is open or shorted, Brake Pedal Switch 'A' 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: C0040 Ford indicates Brake Pedal Switch 'A' Signal Plausibility Failure.
Common causes: Common causes include Faulty Brake Pedal Switch 'A', Brake Pedal Switch 'A' harness is open or shorted, Brake Pedal Switch 'A' 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 26,720

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 May 02, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0040 Ford Description

The Anti-Lock Brake System (ABS) Module monitors the Brake Pedal Switch 'A'. The ABS Module sets the OBDII code when the Brake Pedal Switch 'A' is not to factory specifications.

OBDII Code C0040 Ford - Brake Pedal Switch 'A' Signal Plausibility Failure - AutoCodes.com — C0040 Ford Code - Brake Pedal Switch 'A' Signal Plausibility Failure

What does this mean?

What are the Possible Causes of the DTC C0040 Ford?

Faulty Brake Pedal Switch 'A'
Brake Pedal Switch 'A' harness is open or shorted
Brake Pedal Switch 'A' circuit poor electrical connection

How to Fix the DTC C0040 Ford?

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 C0040 Ford 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 C0040 Ford code?

Need more information on how to fix the C0040 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0040 Ford 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 C0040 Ford Code

1. What are the common symptoms of OBDII code C0040 Ford (Brake Pedal Switch 'A' Signal Plausibility Failure)?

- Common symptoms include the Service AdvanceTrac warning light coming on, traction control system malfunction, and potential loss of stability control.

2. What are the possible causes of OBDII code C0040 Ford?

- The code C0040 Ford can be triggered by a faulty brake pedal switch, damaged wiring harness, faulty ABS module, or issues with the stability control system.

3. How can I diagnose the Brake Pedal Switch 'A' Signal Plausibility Failure in my Ford vehicle?

- To diagnose this issue, you can use a diagnostic scan tool to retrieve the specific trouble codes, inspect the brake pedal switch for proper operation, and check the wiring connections for any damage.

4. Can I continue driving my vehicle with the C0040 Ford code present?

- It is not recommended to drive your vehicle with the C0040 Ford code active, as it can affect the proper functioning of the traction control and stability control systems, potentially compromising your safety.

5. How can I repair OBDII code C0040 Ford in my Ford vehicle?

- Repairing the C0040 Ford code may involve replacing the faulty brake pedal switch, repairing any damaged wiring, or reprogramming the ABS module to resolve the signal plausibility failure.

6. Will resetting the trouble codes make the C0040 Ford code disappear permanently?

- Resetting the trouble codes may temporarily clear the C0040 Ford code, but if the underlying issue causing the signal plausibility failure is not addressed, the code is likely to reappear.

7. How much does it typically cost to repair OBDII code C0040 Ford in a Ford vehicle?

- The cost of repairing the C0040 Ford code can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.

8. Can a DIY enthusiast fix the Brake Pedal Switch 'A' Signal Plausibility Failure in a Ford vehicle?

- While some DIY enthusiasts may have the skills to diagnose and repair the C0040 Ford code, it is recommended to consult a professional mechanic for proper diagnosis and repair to ensure safety and accuracy.

9. Is the C0040 Ford code a serious issue that requires immediate attention?

- Yes, the C0040 Ford code should be addressed promptly to prevent any potential safety hazards related to the malfunction of the traction control and stability control systems.

10. How long does it typically take to repair the Brake Pedal Switch 'A' Signal Plausibility Failure in a Ford vehicle?

- The repair time for the C0040 Ford code can vary depending on the specific cause and complexity of the issue, but it may take anywhere from 1 to 3 hours to diagnose and repair the problem.