AutoCodes – GMC – B1264 GMC

B1264 GMC Code - Floor Door Actuator Failure

Quick Answer

Under normal operation, the panel/defrost and floor door actuator motors are supplied voltage or ground through the circuit, depending on desired actuator rotation, by the Electronic Automatic Temperature Control (EATC) module. Common causes include Faulty Floor Door Actuator, Floor Door Actuator harness is open or shorted, Floor 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: B1264 GMC indicates Floor Door Actuator Failure.
Common causes: Common causes include Faulty Floor Door Actuator, Floor Door Actuator harness is open or shorted, Floor 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.

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Code Popularity 1,201

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
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Code B1264 GMC Description

Under normal operation, the panel/defrost and floor door actuator motors are supplied voltage or ground through the circuit, depending on desired actuator rotation, by the Electronic Automatic Temperature Control (EATC) module. The EATC module then supplies the appropriate voltage or ground to the other side of the actuator motor. The panel/defrost and floor door actuator feedback resistors are supplied a ground and a 5-volt reference voltage from the EATC module. The EATC module reads the voltage on the circuit to determine the actuator position by the position of the actuator feedback resistor wiper arm.

OBDII Code B1264 GMC - Floor Door Actuator Failure - AutoCodes.com — B1264 GMC Code - Floor Door Actuator Failure

What does this mean?

What are the Possible Causes of the DTC B1264 GMC?

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

How to Fix the DTC B1264 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 B1264 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 B1264 GMC code?

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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 B1264 GMC Code

1. What are the common symptoms of a B1264 GMC OBDII code related to Floor Door Actuator Failure?

- Common symptoms include inconsistent air distribution from the HVAC system, improper temperature control, and unusual noises from the dashboard area.

2. What are the possible causes of a B1264 GMC code indicating Floor Door Actuator Failure?

- The code may be triggered by a malfunctioning floor door actuator, a faulty HVAC control module, wiring issues, or a damaged blend door.

3. How can I diagnose a B1264 GMC code linked to Floor Door Actuator Failure?

- Diagnosis involves using an OBDII scanner to retrieve the specific code, checking the floor door actuator for proper operation, inspecting the wiring for damage, and testing the HVAC control module.

4. Can I repair a B1264 GMC code myself if it indicates Floor Door Actuator Failure?

- DIY repair is possible depending on your mechanical skills. Replacing the floor door actuator, fixing wiring problems, or recalibrating the HVAC system may resolve the issue.

5. How much does it typically cost to repair a B1264 GMC OBDII code related to Floor Door Actuator Failure?

- The cost of repair can vary based on the specific cause. Replacing the floor door actuator can range from $150 to $300, while fixing wiring or control module issues may cost more.

6. Are there any temporary fixes for a B1264 GMC code indicating Floor Door Actuator Failure?

- In some cases, manually adjusting the floor door or resetting the HVAC system can provide a temporary solution, but it's recommended to address the root cause promptly.

7. Will a B1264 GMC code related to Floor Door Actuator Failure affect the vehicle's overall performance?

- While the code itself may not impact the vehicle's drivability, unresolved HVAC issues can lead to discomfort while driving and affect the efficiency of the heating and cooling system.

8. Can a B1264 GMC code be triggered intermittently in relation to Floor Door Actuator Failure?

- Yes, factors like temperature changes, vibration, or system usage can cause the code to appear sporadically, making it important to address the issue even if it temporarily resolves itself.

9. How long does it typically take to repair a B1264 GMC code associated with Floor Door Actuator Failure?

- The repair time can vary depending on the exact cause and the complexity of accessing the components. It may take anywhere from one to three hours to complete the repair.

10. Is it safe to continue driving with a B1264 GMC OBDII code indicating Floor Door Actuator Failure?

- While it may be safe to drive with this code present, it's advisable to address the underlying HVAC issue to ensure proper functionality and comfort in the vehicle.