AutoCodes – GMC – C1294 GMC

C1294 GMC Code - Brake Lamp Switch Circuit Always Active

Quick Answer

The Electronic Brake Control Module (EBCM) 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
C1294 GMC indicates Brake Lamp Switch Circuit Always Active.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 997
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 04, 2020
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Code C1294 GMC Description

The Electronic Brake Control Module (EBCM) monitors the Brake Lamp Switch. The EBCM sets the OBDII code when the Brake Lamp Switch is not to factory specifications.
OBDII Code C1294 GMC - Brake Lamp Switch Circuit Always Active - AutoCodes.com
C1294 GMC Code - Brake Lamp Switch Circuit Always Active

What are the Possible Causes of the DTC C1294 GMC?

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

How to Fix the DTC C1294 GMC?

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 C1294 GMC 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 C1294 GMC code?

Need more information on how to fix the C1294 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1294 GMC 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 C1294 GMC Code

1. What are the common symptoms of OBDII code C1294 GMC?

The common symptoms of OBDII code C1294 GMC, which indicates a Brake Lamp Switch Circuit Always Active, include the brake lights staying on continuously or not working at all.

2. What can cause OBDII code C1294 GMC to trigger?

The most common causes of OBDII code C1294 GMC are a faulty brake lamp switch, a short circuit in the brake lamp switch circuit, or a malfunctioning body control module (BCM).

3. How can I diagnose the issue related to OBDII code C1294 GMC?

To diagnose the issue related to OBDII code C1294 GMC, you can start by checking the brake lamp switch for proper operation, inspecting the wiring and connectors for any damage, and using a diagnostic scanner to read the code and identify the exact problem.

4. Can I still drive my vehicle with OBDII code C1294 GMC present?

It is not recommended to drive your vehicle with OBDII code C1294 GMC present, as it can affect the proper functioning of your brake lights, which are crucial for the safety of you and other drivers on the road.

5. How can I repair OBDII code C1294 GMC?

To repair OBDII code C1294 GMC, you may need to replace the faulty brake lamp switch, repair any damaged wiring or connectors, or reprogram the body control module (BCM) if necessary.

6. Will resetting the trouble codes make OBDII code C1294 GMC go away?

Resetting the trouble codes may temporarily clear OBDII code C1294 GMC, but if the underlying issue is not addressed and repaired, the code is likely to reappear once the problem is detected again.

7. Can a DIY enthusiast fix OBDII code C1294 GMC?

Depending on your level of automotive repair skills and experience, you may be able to fix OBDII code C1294 GMC yourself by following the diagnostic and repair steps outlined in the vehicle's service manual.

8. How important is it to address OBDII code C1294 GMC promptly?

It is important to address OBDII code C1294 GMC promptly to ensure the proper functioning of your brake lights and maintain road safety for yourself and other drivers.

9. Is OBDII code C1294 GMC a serious issue?

While OBDII code C1294 GMC may not directly affect the performance of your vehicle, it is still considered a serious issue as it can compromise the visibility of your brake lights and pose a safety risk on the road.

10. How much does it typically cost to repair OBDII code C1294 GMC at a professional mechanic's shop?

The cost of repairing OBDII code C1294 GMC at a professional mechanic's shop can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

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