Engine-CodesGeneric – B105C

B105C Code - Recirculation Door Travel Range Too Small

Quick Answer

The B105C diagnostic trouble code indicates that the recirculation door in the vehicle's HVAC system is not traveling within the specified range, meaning it may not be opening or closing properly. Common causes include Faulty recirculation door actuator, Debris or obstructions blocking the recirculation door's movement, Electrical issues in the HVAC system. 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
B105C indicates Recirculation Door Travel Range Too Small.
Common causes
Common causes include Faulty recirculation door actuator, Debris or obstructions blocking the recirculation door's movement, Electrical issues in the HVAC system.
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.
Table of contents Created and updated by William Orellana on Aug 19, 2024
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Code B105C Description

The B105C diagnostic trouble code indicates that the recirculation door in the vehicle's HVAC system is not traveling within the specified range, meaning it may not be opening or closing properly. This can lead to issues with the vehicle's heating, ventilation, and air conditioning system, affecting the interior climate control. The recirculation door is responsible for controlling whether air is drawn from inside the vehicle or from outside, so if it is not functioning correctly, it can impact the overall comfort level inside the car. If left unresolved, this issue can lead to inconsistent temperature control, decreased heating or cooling efficiency, and potentially increased wear on the HVAC components.

OBDII Code B105C - Recirculation Door Travel Range Too Small
B105C Code - Recirculation Door Travel Range Too Small

Common Causes of B105C

  1. Faulty recirculation door actuator.
  2. Debris or obstructions blocking the recirculation door's movement.
  3. Electrical issues in the HVAC system.
  4. Wear and tear on the recirculation door components.
  5. Malfunctioning HVAC control module.

Symptoms of B105C

  1. Inconsistent temperature control inside the vehicle.
  2. Unusual noises coming from the HVAC system.
  3. Reduced airflow from the vents.
  4. Unpleasant odors coming from the vents.
  5. Inability to switch between fresh air and recirculated air modes.

How to Fix B105C

  1. Diagnose the specific cause of the issue using a scan tool.
  2. Inspect the recirculation door and actuator for any obstructions or damage.
  3. Replace the faulty recirculation door actuator if necessary.
  4. Clear any debris blocking the recirculation door's movement.
  5. Reset the HVAC system and test the recirculation function to ensure proper operation.

Cost to Fix B105C

The cost of repairing a recirculation door travel range too small issue can vary depending on the specific cause of the problem and the labor rates in your area. On average, you can expect to pay between $150 and $400 for parts and labor. Keep in mind that diagnostic time and labor rates can impact the final cost, so it's recommended to get quotes from local auto repair shops for a more accurate estimate.

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Code B105C 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.

Frequently Asked Questions about B105C Code

1. What are the common symptoms of OBDII code B105C (Recirculation Door Travel Range Too Small)?

- The common symptoms include inconsistent air distribution in the HVAC system, inadequate heating or cooling inside the vehicle, and unusual noises coming from the HVAC system.

2. What are the possible causes of OBDII code B105C?

- The code B105C can be triggered by issues such as a faulty recirculation door actuator, a malfunctioning HVAC control module, or mechanical obstructions preventing the recirculation door from moving properly.

3. How can I diagnose the cause of OBDII code B105C?

- Diagnosing the code B105C typically involves inspecting the recirculation door actuator, checking for any physical obstructions in the HVAC system, and using a diagnostic scan tool to analyze the HVAC control module's data.

4. What are some repair tips for addressing OBDII code B105C?

- Repairing OBDII code B105C may involve replacing the recirculation door actuator, recalibrating the HVAC system, clearing the diagnostic trouble codes, and ensuring proper functionality of the recirculation door.

5. Can I drive my vehicle with OBDII code B105C active?

- It is generally safe to drive the vehicle with the code B105C, but it is recommended to address the issue promptly to prevent any long-term damage to the HVAC system and ensure optimal comfort inside the vehicle.

6. How much does it cost to repair OBDII code B105C?

- The cost of repairing OBDII code B105C can vary depending on the specific cause of the issue, the labor rates of the repair facility, and the cost of any replacement parts needed. It is advisable to obtain quotes from different mechanics or dealerships.

7. Can I reset OBDII code B105C without repairing the issue?

- While you can clear the diagnostic trouble codes associated with OBDII code B105C using a scan tool, it is important to address the underlying problem causing the code to prevent it from reoccurring.

8. Is OBDII code B105C a serious issue?

- OBDII code B105C is not typically a serious issue that affects the drivability or safety of the vehicle, but it can impact the comfort and functionality of the HVAC system. Addressing the code in a timely manner is recommended.

9. How long does it take to repair OBDII code B105C?

- The repair time for OBDII code B105C can vary depending on the complexity of the underlying issue, the availability of replacement parts, and the experience of the mechanic. In some cases, the repair can be completed within a few hours.

10. Can I prevent OBDII code B105C from occurring in the future?

- Regular maintenance of the HVAC system, checking for any signs of unusual noises or air distribution issues, and addressing any HVAC system problems promptly can help prevent OBDII code B105C from occurring in the future.

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