AutoCodes – RAM – B105C RAM

B105C RAM Code - Recirculation Door Travel Range Too Small

Quick Answer

After the initial installation of the A/C Heater Module, the controller is calibrated to each individual blend/mode door actuator. Common causes include Binding Recirculation Door, Faulty Recirculation Door Actuator, Recirculation Door Actuator harness is open or shorted. 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: B105C RAM indicates Recirculation Door Travel Range Too Small.
Common causes: Common causes include Binding Recirculation Door, Faulty Recirculation Door Actuator, Recirculation Door Actuator harness is open or shorted.
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.

Save to My Repairs My Repairs

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

Code Popularity 1,882

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 18, 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 B105C RAM Description

After the initial installation of the A/C Heater Module, the controller is calibrated to each individual blend/mode door actuator. These calibrations are stored as in the number of pulses it takes to move the door from one stop to another. The A/C Heater Module drives the Door Actuators by the use of Door Driver circuit and a Common Door Driver circuit and monitors all door actuator pulses to detect door movement in both directions. Most of the door actuators share a common door driver circuit but each door actuator has its own unique driver circuit. Due to shared circuitry, similar Diagnostic Trouble Codes (DTCs) can set at the same time for multiple actuators depending upon the type of circuit malfunction, its location, and the direction the actuator is moving when the malfunction is present.

OBDII Code B105C RAM - Recirculation Door Travel Range Too Small - AutoCodes.com — B105C RAM Code - Recirculation Door Travel Range Too Small

What does this mean?

What are the Possible Causes of the DTC B105C RAM?

Binding Recirculation Door
Faulty Recirculation Door Actuator
Recirculation Door Actuator harness is open or shorted
Recirculation Door Actuator circuit poor electrical connection
Faulty A/C Heater Module

How to Fix the DTC B105C RAM?

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 B105C RAM 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 B105C RAM code?

Need more information on how to fix the B105C RAM code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B105C RAM 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 B105C RAM Code

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

- Common symptoms include inconsistent air flow from the HVAC system, difficulty adjusting cabin temperature, and unusual noises coming from the ventilation system.

2. What typically causes the OBDII code B105C RAM to trigger for "Recirculation Door Travel Range Too Small"?

- This code is often triggered by a malfunction in the recirculation door actuator or a mechanical issue with the recirculation door itself, leading to restricted movement.

3. How can I diagnose the problem related to OBDII code B105C RAM "Recirculation Door Travel Range Too Small"?

- Diagnosing the issue involves inspecting the recirculation door actuator, checking for any obstructions or blockages in the door's path, and testing the functionality of the HVAC system.

4. What are some possible repair tips for fixing OBDII code B105C RAM "Recirculation Door Travel Range Too Small"?

- Repair tips may include replacing the faulty recirculation door actuator, recalibrating the HVAC system, lubricating the recirculation door mechanism, or repairing any damaged components.

5. Is it safe to continue driving with the OBDII code B105C RAM "Recirculation Door Travel Range Too Small" unresolved?

- While the vehicle may still be operable with this issue, it is recommended to address it promptly to ensure proper functioning of the HVAC system and maintain a comfortable cabin environment.

6. Can I reset the OBDII code B105C RAM "Recirculation Door Travel Range Too Small" using a diagnostic tool?

- Resetting the code with a diagnostic tool is possible after the underlying issue has been repaired. However, simply clearing the code without addressing the root cause may lead to it reoccurring.

7. Are there any preventive measures to avoid encountering OBDII code B105C RAM "Recirculation Door Travel Range Too Small" in the future?

- Regularly inspecting and maintaining the HVAC system, including the recirculation door mechanism, can help prevent issues that may trigger this code. Additionally, addressing any unusual noises or airflow inconsistencies promptly can help avoid more significant problems.

8. How long does it typically take to repair OBDII code B105C RAM "Recirculation Door Travel Range Too Small"?

- The repair time can vary depending on the exact cause of the issue and the extent of the necessary repairs. In some cases, it may be a relatively quick fix, while in others, it could require more extensive troubleshooting and part replacement.

9. Can a DIY enthusiast without professional automotive experience address OBDII code B105C RAM "Recirculation Door Travel Range Too Small"?

- While some simple maintenance tasks related to this code may be within reach for a DIY enthusiast, diagnosing and repairing more complex issues with the HVAC system is best left to professionals with the appropriate tools and expertise.