AutoCodes – Dodge – B2105 Dodge

B2105 Dodge 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 Dodge 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 1,573

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

What does this mean?

What are the Possible Causes of the DTC B2105 Dodge?

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 Dodge?

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 Dodge 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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Need Help with the Code?

Get the B2105 Dodge 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 Dodge Code

1. What are the common symptoms of OBDII code B2105 in a Dodge vehicle?

- Common symptoms include difficulty starting the vehicle, the engine not cranking, and the ignition switch not functioning properly.

2. What causes the OBDII code B2105 related to Ignition Unlock Run/Start Control Circuit High in a Dodge?

- The code B2105 typically indicates a malfunction in the ignition unlock run/start control circuit, which can be caused by a faulty ignition switch, wiring issues, or a defective control module.

3. How can I diagnose the OBDII code B2105 in my Dodge effectively?

- To diagnose the B2105 code accurately, it is recommended to use a diagnostic scanner to retrieve the specific fault codes, perform a visual inspection of the wiring and connectors, and test the components involved in the ignition system.

4. Is it safe to continue driving my Dodge with the OBDII code B2105 present?

- It is not recommended to drive your Dodge with the B2105 code active, as it can lead to potential starting issues or complete engine failure. It is best to address the issue promptly to avoid further damage.

5. What are some repair tips for fixing the OBDII code B2105 in a Dodge?

- Repair tips for resolving the B2105 code may include checking and repairing any damaged wiring, replacing the faulty ignition switch, or reprogramming the control module as needed.

6. Can a DIY enthusiast fix the OBDII code B2105 issue in a Dodge, or is professional help necessary?

- While some experienced DIY enthusiasts may be able to troubleshoot and fix the B2105 code themselves, it is recommended to seek professional help, especially if dealing with complex wiring or control module issues.

7. How much can I expect to pay for repairing the OBDII code B2105 in a Dodge at a mechanic or dealership?

- The cost of repairing the B2105 code in a Dodge can vary depending on the exact cause of the issue, but it may range from $100 to $500 or more, including parts and labor.

8. Will resetting the OBDII code B2105 in my Dodge make it go away permanently?

- Resetting the B2105 code may temporarily clear the error code, but if the underlying issue causing the fault is not addressed, the code is likely to reappear. It is essential to diagnose and fix the root cause of the problem.

9. Can extreme weather conditions or environmental factors trigger the OBDII code B2105 in a Dodge?

- While extreme weather conditions or environmental factors may not directly cause the B2105 code, they can exacerbate existing issues with the ignition system, leading to the code being triggered.

10. Is the OBDII code B2105 specific to Dodge vehicles, or can it occur in other car makes and models?

- The OBDII code B2105 related to the Ignition Unlock Run/Start Control Circuit High is specific to Dodge vehicles and may not apply to other car makes and models.