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Engine-Codes – Generic – B0446

B0446 Code - Right Air Temperature Actuator

Quick Answer

The B0446 code refers to an issue with the Right Air Temperature Actuator in the vehicle's HVAC (Heating, Ventilation, and Air Conditioning) system. Common causes include A faulty or malfunctioning Right Air Temperature Actuator, Wiring issues or electrical problems related to the actuator, Damage or wear and tear to the actuator due to age or usage. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means
B0446 indicates Right Air Temperature Actuator.
Common causes
Common causes include A faulty or malfunctioning Right Air Temperature Actuator, Wiring issues or electrical problems related to the actuator, Damage or wear and tear to the actuator due to age or usage.
Severity
Low - monitor the vehicle and repair when practical.
Can I drive?
The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
What is this?
Table of contents Created and updated by William Orellana on Aug 25, 2024
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Code B0446 Description

The B0446 code refers to an issue with the Right Air Temperature Actuator in the vehicle's HVAC (Heating, Ventilation, and Air Conditioning) system. This actuator is responsible for controlling the temperature of the air that comes out of the right side vents in the vehicle. When this actuator malfunctions, it can lead to incorrect temperature control on the right side of the vehicle, resulting in discomfort for passengers or inefficient heating and cooling.

OBDII Code B0446 - Right Air Temperature Actuator
B0446 Code - Right Air Temperature Actuator

Common Causes of B0446

  1. A faulty or malfunctioning Right Air Temperature Actuator.
  2. Wiring issues or electrical problems related to the actuator.
  3. Damage or wear and tear to the actuator due to age or usage.
  4. Issues with the HVAC control module or system.

Symptoms of B0446

  1. Uneven temperature distribution in the vehicle, with one side noticeably warmer or cooler than the other.
  2. Inconsistent or inaccurate temperature control settings on the right side of the vehicle.
  3. Strange noises coming from the HVAC system when adjusting the temperature.
  4. The HVAC system not responding to temperature adjustments on the right side of the vehicle.

How to Fix B0446

  1. Diagnose the specific cause of the issue by using a scan tool to read the error code and check the actuator's functionality.
  2. Access the Right Air Temperature Actuator, typically located behind the dashboard on the right side of the vehicle.
  3. Remove and replace the faulty actuator with a new one, ensuring proper installation.
  4. Test the HVAC system to ensure that the temperature control on the right side is functioning correctly.
  5. Clear the error code and reset the system to ensure that the issue has been resolved.

Cost to Fix B0446

The cost of repairing a Right Air Temperature Actuator issue can vary depending on the make and model of the vehicle, as well as the labor rates in your area. On average, the parts for this repair can range from $50 to $150, while the labor cost may be between $100 and $200. Therefore, the total cost could be anywhere from $150 to $350. It's recommended to get quotes from local auto repair shops to get a more accurate estimate for your specific vehicle.

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Code B0446 Information for Specific Makes

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.

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