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Engine-Codes – Generic – B1246

B1246 Code - Problem In The Rear Air Mix Control Motor Circuit, Linkage, Door, Or Motor

Quick Answer

The B1246 code indicates a problem in the rear air mix control motor circuit, linkage, door, or motor in the vehicle's HVAC system. Common causes include Faulty rear air mix control motor, Damaged or disconnected linkage between the motor and blend door, Electrical issues in the circuit controlling the motor. 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
B1246 indicates Problem In The Rear Air Mix Control Motor Circuit, Linkage, Door, Or Motor.
Common causes
Common causes include Faulty rear air mix control motor, Damaged or disconnected linkage between the motor and blend door, Electrical issues in the circuit controlling the motor.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code B1246 Description

The B1246 code indicates a problem in the rear air mix control motor circuit, linkage, door, or motor in the vehicle's HVAC system. This code specifically points to an issue with the rear air mix control system, which is responsible for regulating the temperature of the air that is blown into the rear passenger compartment. When this system malfunctions, it can result in issues with controlling the temperature in the rear of the vehicle, leading to discomfort for passengers.

OBDII Code B1246 - Problem In The Rear Air Mix Control Motor Circuit, Linkage, Door, Or Motor
B1246 Code - Problem In The Rear Air Mix Control Motor Circuit, Linkage, Door, Or Motor

Common Causes of B1246

  1. Faulty rear air mix control motor
  2. Damaged or disconnected linkage between the motor and blend door
  3. Electrical issues in the circuit controlling the motor
  4. Jammed or stuck blend door in the rear HVAC system
  5. Wear and tear on components leading to malfunction

Symptoms of B1246

  1. Inconsistent temperature control in the rear HVAC system
  2. Lack of airflow or weak airflow from rear vents
  3. Unusual noises coming from the rear HVAC system
  4. Rear passenger complaints of discomfort due to temperature issues
  5. Rear HVAC system not responding to temperature adjustments

How to Fix B1246

  1. Perform a diagnostic scan to confirm the B1246 code and identify the specific issue
  2. Inspect the rear air mix control motor, linkage, door, and circuit for any visible damage or malfunctions
  3. Replace the faulty rear air mix control motor or repair any damaged components
  4. Reset the HVAC system and test for proper operation
  5. Clear the diagnostic trouble code and verify that the issue has been resolved

Cost to Fix B1246

The typical repair costs for addressing a B1246 code related to the rear air mix control motor circuit can range from $200 to $500, depending on the specific issue and the cost of parts and labor. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's recommended to inquire about local rates for a more accurate estimate.

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Code B1246 Information for Specific Makes

  • B1246 Acura — Problem In The Rear Air Mix Control Motor Circuit, Linkage, Door, Or Motor
  • B1246 Honda — Problem In The Rear Air Mix Control Motor Circuit, Linkage, Door, Or Motor
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 B1246 Code

1. What are the common symptoms of OBDII code B1246?

The common symptoms of OBDII code B1246 include inconsistent air temperature from the rear vents, inability to control the rear air temperature, and unusual noises coming from the rear air mix control system.

2. What causes OBDII code B1246 to occur?

OBDII code B1246 typically occurs due to a malfunction in the rear air mix control motor circuit, linkage, door, or motor. This can be caused by wiring issues, a faulty motor, or a damaged linkage.

3. How can I diagnose the problem related to OBDII code B1246?

To diagnose the issue related to OBDII code B1246, you can use an OBDII scanner to read the code, visually inspect the rear air mix control components for any visible damage, and test the motor and wiring for proper functionality.

4. What are the repair options for OBDII code B1246?

Repair options for OBDII code B1246 may include repairing or replacing damaged wiring, replacing the rear air mix control motor, repairing or replacing the linkage, or addressing any issues with the air mix control door.

5. Can I drive my vehicle with OBDII code B1246?

It is not recommended to drive your vehicle with OBDII code B1246, as it can lead to discomfort for rear passengers due to inconsistent air temperature control. It is advised to address the issue promptly to ensure proper functionality of the rear air mix control system.

6. How urgent is it to fix OBDII code B1246?

While OBDII code B1246 may not pose an immediate safety risk, it is important to address the issue in a timely manner to ensure proper functioning of the rear air mix control system and provide comfort for rear passengers.

7. Can I reset OBDII code B1246 without fixing the underlying issue?

Resetting OBDII code B1246 without fixing the underlying issue will only temporarily clear the code. The issue will persist, and the code is likely to reappear until the root cause is addressed.

8. Are there any preventative measures to avoid OBDII code B1246?

To prevent OBDII code B1246, regular maintenance of the rear air mix control system is recommended. This includes checking for any signs of wear or damage during routine inspections and addressing any issues promptly.

9. How do I know if the rear air mix control motor needs to be replaced?

If the rear air mix control motor is making unusual noises, not responding to temperature adjustments, or visibly damaged, it may need to be replaced to resolve OBDII code B1246.

10. Can OBDII code B1246 affect the overall performance of my vehicle?

While OBDII code B1246 is specific to the rear air mix control system and may not directly affect the overall performance of the vehicle, it can impact passenger comfort and the functionality of the HVAC system.

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