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

Quick Answer

The B2105 Chrysler diagnostic trouble code (DTC) refers to the Ignition Unlock Run/Start Control Circuit High. Common causes include Faulty wiring in the ignition unlock system, Malfunctioning ignition unlock control module, Damaged ignition switch. 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 Chrysler indicates Ignition Unlock Run/Start Control Circuit High.
Common causes
Common causes include Faulty wiring in the ignition unlock system, Malfunctioning ignition unlock control module, Damaged ignition switch.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code B2105 Chrysler Description

The B2105 Chrysler diagnostic trouble code (DTC) refers to the Ignition Unlock Run/Start Control Circuit High. This code indicates that there is a high voltage condition in the circuit that controls the ignition unlock feature, which allows the vehicle to start and run. The ignition unlock system is designed to prevent the vehicle from starting unless the correct key or key fob is used, providing an added layer of security.

OBDII Code B2105 Chrysler - Ignition Unlock Run/Start Control Circuit High
B2105 Chrysler Code - Ignition Unlock Run/Start Control Circuit High

Common Causes of B2105 Chrysler

  1. Faulty wiring in the ignition unlock system
  2. Malfunctioning ignition unlock control module
  3. Damaged ignition switch
  4. Faulty key fob
  5. Corrosion or loose connections in the circuit

Symptoms of B2105 Chrysler

  1. Difficulty starting the engine
  2. Engine stalling or running rough
  3. Inability to start the vehicle
  4. Reduced engine power or performance
  5. Illumination of the check engine light

How to Fix B2105 Chrysler

  1. Diagnose the issue using a scan tool to retrieve the specific DTC and pinpoint the cause of the high voltage condition.
  2. Inspect the wiring harness, connectors, and components of the ignition unlock system for any signs of damage or corrosion.
  3. Test the ignition unlock control module and ignition switch for proper operation and replace if necessary.
  4. Check the key fob for functionality and replace the battery if needed.
  5. Clear the DTC from the vehicle's memory and test the system to ensure the issue has been resolved.

Cost to Fix B2105 Chrysler

The typical repair costs for addressing the B2105 Chrysler code can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay anywhere from $100 to $300 for parts and labor, but this can fluctuate based on the extent of the repair needed. It's advisable to consult with a trusted auto repair shop for a more accurate estimate based on your vehicle's make and model, as well as local labor rates. Keep in mind that additional diagnostic time may be required to pinpoint the exact cause of the code, which can affect the overall cost of the repair.

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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 B2105 Chrysler Code

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

- Common symptoms include difficulty starting the vehicle, inability to turn the ignition key, and the steering wheel being locked in place.

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

- The code B2105 can be caused by issues with the ignition switch, a faulty ignition lock cylinder, wiring issues, or a malfunctioning body control module.

3. How can I diagnose the B2105 code in my Chrysler?

- To diagnose the issue, it is recommended to use a diagnostic scanner to read the code, perform a visual inspection of the wiring, check the ignition switch, and test the body control module.

4. Can I still drive my Chrysler with the B2105 code present?

- It is not recommended to drive the vehicle with the B2105 code present, as it can lead to potential safety hazards and further damage to the ignition system.

5. How can I repair the Ignition Unlock Run/Start Control Circuit High issue in my Chrysler?

- Repair options include replacing the ignition switch, fixing any wiring issues, replacing the ignition lock cylinder, or reprogramming the body control module if necessary.

6. Will resetting the OBDII code B2105 make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear.

7. Can a DIY enthusiast fix the B2105 code issue in a Chrysler?

- Depending on the root cause, some DIY enthusiasts may be able to address the B2105 code by following repair guides and using appropriate tools, but complex issues may require professional assistance.

8. Is the B2105 code specific to Chrysler vehicles only?

- While the B2105 code is commonly associated with Chrysler vehicles, it may also appear in other vehicle makes and models with similar ignition system components.

9. How much can I expect to pay for a professional repair of the B2105 code in my Chrysler?

- Repair costs for the B2105 code can vary depending on the specific issue, location, and labor rates, but it is advisable to budget for diagnostic fees, parts, and labor.

10. Can a faulty battery or alternator cause the B2105 code to trigger in a Chrysler?

- While a faulty battery or alternator can potentially cause electrical issues, the B2105 code is more commonly linked to problems with the ignition system components themselves.

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