AutoCodes – Acura – C0040 Acura

C0040 Acura Code - Brake Lamp Switch Failure

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the Brake Lamp Switch. Common causes include Faulty Brake Lamp Switch, Brake Lamp Switch harness is open or shorted, Brake Lamp Switch 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 Acura indicates Brake Lamp Switch Failure.
Common causes: Common causes include Faulty Brake Lamp Switch, Brake Lamp Switch harness is open or shorted, Brake Lamp Switch 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,872

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 03, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code C0040 Acura Description

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

OBDII Code C0040 Acura - Brake Lamp Switch Failure - AutoCodes.com — C0040 Acura Code - Brake Lamp Switch Failure

What does this mean?

What are the Possible Causes of the DTC C0040 Acura?

Faulty Brake Lamp Switch
Brake Lamp Switch harness is open or shorted
Brake Lamp Switch circuit poor electrical connection

How to Fix the DTC C0040 Acura?

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 Acura 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 Acura code?

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

Need Help with the Code?

Get the C0040 Acura 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 Acura Code

1. What are the common symptoms of OBDII code C0040 in an Acura related to brake lamp switch failure?

The common symptoms include malfunctioning brake lights, the inability to shift out of park, and illuminated brake warning lights on the dashboard.

2. What is the most common cause of OBDII code C0040 in an Acura related to brake lamp switch failure?

The most common cause is a faulty brake lamp switch, which may be due to wear and tear or electrical issues.

3. How can I diagnose if the brake lamp switch is the cause of OBDII code C0040 in my Acura?

You can use a multimeter to check for continuity and proper voltage at the brake lamp switch terminals. Additionally, visually inspecting the switch for any signs of damage can help in diagnosis.

4. Can I still drive my Acura if OBDII code C0040 related to brake lamp switch failure is present?

It is not recommended to drive the vehicle with this code as it can affect the safety of your vehicle, especially if the brake lights are not functioning properly.

5. Is it possible to repair the brake lamp switch on my Acura myself?

Yes, it is possible to replace the brake lamp switch yourself if you have the necessary tools and knowledge. However, if you are unsure, it is best to consult a professional mechanic.

6. How much does it typically cost to replace a brake lamp switch in an Acura?

The cost of replacing a brake lamp switch can vary depending on the model of your Acura and labor costs. On average, the part itself may range from $20 to $50, not including labor.

7. Will resetting the OBDII code C0040 related to brake lamp switch failure make it go away permanently?

Resetting the code may temporarily clear the warning light, but if the underlying issue with the brake lamp switch is not fixed, the code is likely to reappear.

8. Are there any safety concerns associated with ignoring OBDII code C0040 related to brake lamp switch failure in my Acura?

Ignoring this code can lead to potential safety hazards due to malfunctioning brake lights, which can increase the risk of accidents on the road.

9. Can a malfunctioning brake lamp switch cause other issues in my Acura besides OBDII code C0040?

Yes, a faulty brake lamp switch can cause other issues such as difficulty shifting gears and problems with the vehicle's cruise control system.

10. How often should I inspect or replace the brake lamp switch in my Acura to prevent OBDII code C0040 from occurring?

It is recommended to inspect the brake lamp switch during regular maintenance checks and replace it if any issues are detected to prevent the occurrence of OBDII code C0040 related to brake lamp switch failure.