AutoCodes – GMC – B1265 GMC

B1265 GMC Code - Cold Air Bypass Door Actuator Circuit Failure

Quick Answer

The Electronic Automatic Temperature Control (EATC) Module monitors the Cold Air Bypass Door Actuator. Common causes include Faulty Cold Air Bypass Door Actuator, Cold Air Bypass Door Actuator harness is open or shorted, Cold Air Bypass Door Actuator circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: B1265 GMC indicates Cold Air Bypass Door Actuator Circuit Failure.
Common causes: Common causes include Faulty Cold Air Bypass Door Actuator, Cold Air Bypass Door Actuator harness is open or shorted, Cold Air Bypass Door Actuator circuit poor electrical connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

Save to My Repairs My Repairs

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

Code Popularity 1,444

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 29, 2024

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 B1265 GMC Description

The Electronic Automatic Temperature Control (EATC) Module monitors the Cold Air Bypass Door Actuator. The EATC Module sets the OBDII code when the Cold Air Bypass Door Actuator is not to factory specifications.

OBDII Code B1265 GMC - Cold Air Bypass Door Actuator Circuit Failure - AutoCodes.com — B1265 GMC Code - Cold Air Bypass Door Actuator Circuit Failure

What does this mean?

What are the Possible Causes of the DTC B1265 GMC?

Faulty Cold Air Bypass Door Actuator
Cold Air Bypass Door Actuator harness is open or shorted
Cold Air Bypass Door Actuator circuit poor electrical connection
Faulty Electronic Automatic Temperature Control (EATC) Module

How to Fix the DTC B1265 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 B1265 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 B1265 GMC code?

Need more information on how to fix the B1265 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1265 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 B1265 GMC Code

1. What are the common symptoms of OBDII code B1265 GMC (Cold Air Bypass Door Actuator Circuit Failure)?

- Common symptoms include inconsistent heating or cooling inside the vehicle, poor air circulation, and unusual clicking or tapping sounds from the HVAC system.

2. What can cause the OBDII code B1265 GMC to trigger?

- The code is typically triggered by a malfunction in the cold air bypass door actuator circuit, which can be caused by a faulty actuator, wiring issues, or a blown fuse.

3. How serious is the B1265 GMC code?

- While the code may not prevent the vehicle from running, it can lead to discomfort due to inconsistent temperature control and poor air circulation. It is recommended to address the issue promptly.

4. How can I diagnose the B1265 GMC code?

- Diagnosing the code involves using an OBDII scanner to retrieve the specific fault code, inspecting the cold air bypass door actuator and related wiring for damage, and testing the actuator's functionality.

5. What are some DIY repair tips for fixing the Cold Air Bypass Door Actuator Circuit Failure?

- DIY repair tips include checking and replacing any blown fuses related to the HVAC system, inspecting and repairing damaged wiring, and replacing the cold air bypass door actuator if it is faulty.

6. Can I drive my vehicle with the B1265 GMC code?

- It is generally safe to drive the vehicle with the code, but it is advisable to address the issue as soon as possible to avoid discomfort and potential long-term damage to the HVAC system.

7. How much does it typically cost to repair the Cold Air Bypass Door Actuator Circuit Failure?

- The cost of repair can vary depending on the extent of the damage and whether you choose to do the repairs yourself or take the vehicle to a professional. Costs may range from $100 to $300 or more.

8. Will resetting the OBDII code B1265 GMC resolve the issue?

- Resetting the code may temporarily clear the fault code, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is recommended to diagnose and fix the root cause of the problem.

9. Is the OBDII code B1265 GMC a common issue in GMC vehicles?

- The B1265 code is relatively common in GMC vehicles with HVAC systems that use cold air bypass door actuators. It can occur in various models and years, particularly in older vehicles.

10. How long does it take to repair the B1265 GMC code?

- The repair time can vary based on the complexity of the issue, your experience level with automotive repairs, and the availability of parts. In general, it can take anywhere from 1 to 3 hours to address the Cold Air Bypass Door Actuator Circuit Failure.