AutoCodes – RAM – B2105 RAM

B2105 RAM Code - Ignition Unlock Run/Start Control Circuit High

Quick Answer

The Front Control Module monitors the Ignition Unlock Run/Start Control Circuit. Common causes include Faulty Shifter Lever Assembly, Shifter Lever Assembly harness is open or shorted, Shifter Lever Assembly circuit poor electrical connection. 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: B2105 RAM indicates Ignition Unlock Run/Start Control Circuit High.
Common causes: Common causes include Faulty Shifter Lever Assembly, Shifter Lever Assembly harness is open or shorted, Shifter Lever Assembly circuit poor electrical connection.
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.

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Code Popularity 585

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 17, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2105 RAM Description

The Front Control Module monitors the Ignition Unlock Run/Start Control Circuit. The Front Control Module will set this Diagnostic Trouble Code (DTC) within 2 seconds if the ignition unlock run/start circuit voltage is not what the expected value should be.

OBDII Code B2105 RAM - Ignition Unlock Run/Start Control Circuit High - AutoCodes.com — B2105 RAM Code - Ignition Unlock Run/Start Control Circuit High

What does this mean?

What are the Possible Causes of the DTC B2105 RAM?

Faulty Shifter Lever Assembly
Shifter Lever Assembly harness is open or shorted
Shifter Lever Assembly circuit poor electrical connection
Faulty Front Control Module (FCM)

How to Fix the DTC B2105 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 B2105 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 B2105 RAM code?

Need more information on how to fix the B2105 RAM code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2105 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 B2105 RAM Code

1. What are the common symptoms of OBDII code B2105 RAM?

The common symptoms of OBDII code B2105 RAM include difficulty starting the vehicle, intermittent stalling, and the inability to turn the ignition key.

2. What are the possible causes of the Ignition Unlock Run/Start Control Circuit High error code?

Possible causes of the B2105 code include a faulty ignition switch, damaged wiring in the ignition circuit, or a malfunctioning control module.

3. How can I diagnose the B2105 error code?

Diagnosing the B2105 code typically involves conducting a thorough inspection of the ignition system, checking the wiring for any visible damage, and using a scan tool to retrieve additional diagnostic trouble codes.

4. What repair tips can help fix the B2105 RAM code?

Repair tips for resolving the B2105 code may include repairing or replacing damaged wiring, testing and replacing the ignition switch, and resetting the control module after making necessary repairs.

5. Can I continue driving my vehicle with the B2105 error code?

It is not recommended to continue driving your vehicle with the B2105 code present, as it may lead to potential safety hazards and further damage to the ignition system.

6. How much does it typically cost to repair the B2105 RAM code?

The cost of repairing the B2105 code can vary depending on the underlying cause of the issue, but it may range from $100 to $300 for parts and labor.

7. Will resetting the error code make it go away permanently?

Resetting the error code may temporarily clear the B2105 code, but if the underlying issue is not addressed and repaired, the code is likely to reappear.

8. Can a DIY enthusiast fix the B2105 code at home?

Depending on your level of automotive expertise, you may be able to diagnose and repair the B2105 code at home. However, it is recommended to consult a professional mechanic for an accurate diagnosis and proper repair.

9. Is the B2105 RAM code a serious issue?

The B2105 code can be a serious issue as it affects the ignition system, which is crucial for the proper functioning of the vehicle. It is important to address this code promptly to avoid potential safety risks.

10. How long does it take to repair the B2105 error code?

The repair time for the B2105 code can vary based on the specific cause of the issue and the complexity of the repair. It may take a few hours to a full day to diagnose and fix the problem.