AutoCodes – Jeep – B2108 Jeep

B2108 Jeep Code - Ignition Switch Sense Input Circuit Low

Quick Answer

The Instrument Cluster monitors Ignition Switch Sense Input Circuit. Common causes include Faulty Ignition Switch, Ignition Switch harness is open or shorted, Ignition Switch 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: B2108 Jeep indicates Ignition Switch Sense Input Circuit Low.
Common causes: Common causes include Faulty Ignition Switch, Ignition Switch harness is open or shorted, Ignition Switch 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 807

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 B2108 Jeep Description

The Instrument Cluster monitors Ignition Switch Sense Input Circuit. The Instrument Cluster sets the OBDII code when the Ignition Switch Sense circuit voltage less than 0.3 volts.

OBDII Code B2108 Jeep - Ignition Switch Sense Input Circuit Low - AutoCodes.com — B2108 Jeep Code - Ignition Switch Sense Input Circuit Low

What does this mean?

What are the Possible Causes of the DTC B2108 Jeep?

Faulty Ignition Switch
Ignition Switch harness is open or shorted
Ignition Switch circuit poor electrical connection
Faulty Instrument Cluster

How to Fix the DTC B2108 Jeep?

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 B2108 Jeep 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 B2108 Jeep code?

Need more information on how to fix the B2108 Jeep code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2108 Jeep 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 B2108 Jeep Code

1. What are common symptoms of OBDII code B2108 in a Jeep related to the Ignition Switch Sense Input Circuit Low?

The common symptoms include issues with starting the vehicle, intermittent power loss, and possible stalling while driving.

2. What are the potential causes of OBDII code B2108 in a Jeep?

Possible causes include a faulty ignition switch, damaged wiring or connectors in the ignition switch circuit, or a defective Body Control Module (BCM).

3. How can I diagnose the Ignition Switch Sense Input Circuit Low issue in my Jeep?

To diagnose this issue, you can use a diagnostic scanner to retrieve the specific trouble code, inspect the wiring and connectors for any visible damage, and test the ignition switch for proper functionality.

4. Can a DIY enthusiast repair the B2108 code in a Jeep at home?

While some basic troubleshooting like checking for loose connections and inspecting the wiring can be done at home, diagnosing and repairing the underlying cause of the code may require professional expertise and specialized tools.

5. Is it safe to continue driving my Jeep with the Ignition Switch Sense Input Circuit Low issue?

It is not recommended to drive the vehicle with this issue as it can lead to potential safety hazards such as unexpected stalling or loss of power while driving.

6. How much does it typically cost to repair the Ignition Switch Sense Input Circuit Low problem in a Jeep?

The cost of repair can vary depending on the exact cause of the issue, but it may involve replacing the ignition switch, repairing damaged wiring, or reprogramming the BCM, which can range from a few hundred to over a thousand dollars.

7. Can resetting the OBDII code B2108 in a Jeep make the issue go away permanently?

Resetting the code may temporarily clear the error message, but if the underlying issue causing the code is not addressed, it is likely to reappear once the problem resurfaces.

8. Will replacing the ignition switch fix the B2108 code in a Jeep?

Replacing the ignition switch may resolve the B2108 code if the switch is found to be faulty during diagnosis. However, it is important to ensure that all related components and wiring are also inspected and repaired if necessary.

9. How long does it take to repair the Ignition Switch Sense Input Circuit Low issue in a Jeep?

The repair time can vary depending on the exact cause of the problem and the availability of parts. It may take anywhere from a few hours to a day or more to fully diagnose and repair the issue.

10. Is it possible to prevent the recurrence of the B2108 code in a Jeep?

Regular maintenance and inspection of the ignition system, wiring, and connectors can help prevent the recurrence of the Ignition Switch Sense Input Circuit Low issue in your Jeep.