AutoCodes – RAM – B105D RAM

B105D RAM Code - Recirculation Door Travel Range Too Large

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: B105D RAM indicates Recirculation Door Travel Range Too Large.
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.

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Code Popularity 2,235

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
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Code B105D 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 B105D RAM - Recirculation Door Travel Range Too Large - AutoCodes.com — B105D RAM Code - Recirculation Door Travel Range Too Large

What does this mean?

What are the Possible Causes of the DTC B105D 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 B105D 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 B105D 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.

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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 B105D RAM Code

1. What are the common symptoms of OBDII code B105D RAM (Recirculation Door Travel Range Too Large)?

- The common symptoms include inconsistent air flow from the HVAC system, unusual noises when changing air flow settings, and difficulty maintaining desired cabin temperature.

2. What can cause the OBDII code B105D RAM to trigger?

- The code is typically triggered by a malfunction in the recirculation door actuator or the recirculation door itself, leading to an abnormal range of motion.

3. How serious is the OBDII code B105D RAM (Recirculation Door Travel Range Too Large)?

- While this code may not directly impact the drivability of the vehicle, it can affect the comfort level inside the cabin and the overall performance of the HVAC system.

4. Can I continue driving my vehicle with the B105D RAM code present?

- It is generally safe to continue driving the vehicle with this code, but it is recommended to address the issue promptly to avoid potential discomfort or HVAC system complications.

5. What are some DIY repair tips for fixing the Recirculation Door Travel Range Too Large issue?

- DIY repair tips may include checking and potentially replacing the recirculation door actuator, inspecting the recirculation door for any obstructions or damage, and resetting the HVAC system.

6. How can I diagnose the B105D RAM code in my vehicle?

- Diagnosis typically involves using an OBDII scanner to retrieve the specific code, inspecting the recirculation door actuator and door for any visible issues, and testing the components for proper functionality.

7. Should I reset the B105D RAM code after making repairs?

- Yes, it is recommended to reset the code after making any necessary repairs to see if the issue has been successfully resolved. This can be done using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes.

8. Is it necessary to visit a mechanic for the B105D RAM code or can I fix it myself?

- Depending on your level of automotive knowledge and skills, you may be able to address this issue yourself by following repair guides or seeking assistance from online forums. However, if you are unsure or uncomfortable with the repair process, it is advisable to consult a professional mechanic.

9. What are the potential consequences of ignoring the B105D RAM code?

- Ignoring this code could lead to decreased efficiency of the HVAC system, uncomfortable driving conditions, and potential long-term damage to the HVAC components if left unresolved.

10. Are there any recalls or technical service bulletins related to the B105D RAM code?

- It is advisable to check with the vehicle manufacturer or authorized dealerships for any recalls or technical service bulletins related to the B105D RAM code to see if there are known issues or solutions available.