AutoCodes – Dodge – B2123 Dodge

B2123 Dodge Code - Ignition Run Control Circuit High

Quick Answer

The Front Control Module monitors the Ignition Run Control Circuit. Common causes include Faulty Run Relay, Run Relay harness is open or shorted, Run Relay 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: B2123 Dodge indicates Ignition Run Control Circuit High.
Common causes: Common causes include Faulty Run Relay, Run Relay harness is open or shorted, Run Relay 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 850

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 B2123 Dodge Description

The Front Control Module monitors the Ignition Run Control Circuit. The Front Control Module will set this Diagnostic Trouble Code (DTC) within 500ms if the Run Relay Control Circuit voltage is shorted to voltage.

OBDII Code B2123 Dodge - Ignition Run Control Circuit High - AutoCodes.com — B2123 Dodge Code - Ignition Run Control Circuit High

What does this mean?

What are the Possible Causes of the DTC B2123 Dodge?

Faulty Run Relay
Run Relay harness is open or shorted
Run Relay circuit poor electrical connection
Faulty Front Control Module (FCM)

How to Fix the DTC B2123 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 B2123 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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Get the B2123 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 B2123 Dodge Code

1. What are the common symptoms of OBDII code B2123 Dodge (Ignition Run Control Circuit High)?

- Common symptoms include the engine stalling or not starting, rough idling, and the Check Engine light being illuminated.

2. What causes the OBDII code B2123 Dodge (Ignition Run Control Circuit High)?

- The code is typically triggered by issues with the ignition run control circuit, such as a faulty ignition switch, damaged wiring, or a defective ignition run control relay.

3. How can I diagnose the OBDII code B2123 Dodge (Ignition Run Control Circuit High)?

- Diagnosing this code usually involves checking the ignition system components, inspecting the wiring for any damage or loose connections, and using a diagnostic scanner to read the code and identify the specific issue.

4. What are the possible repair tips for OBDII code B2123 Dodge (Ignition Run Control Circuit High)?

- Repairing this code may involve replacing the faulty ignition switch, repairing or replacing damaged wiring, or replacing the defective ignition run control relay.

5. Can I drive my vehicle with the OBDII code B2123 Dodge (Ignition Run Control Circuit High)?

- It is not recommended to drive your vehicle with this code, as it can lead to potential safety issues such as the engine stalling unexpectedly.

6. How much does it cost to repair OBDII code B2123 Dodge (Ignition Run Control Circuit High)?

- The cost of repairing this code can vary depending on the specific issue causing it and the labor rates of the repair shop. It is recommended to get a diagnostic inspection to determine the exact repair cost.

7. How long does it take to repair OBDII code B2123 Dodge (Ignition Run Control Circuit High)?

- The repair time for this code can vary based on the complexity of the issue and the availability of parts. It is best to consult with a professional mechanic for an accurate estimate of the repair time.

8. Can a DIY enthusiast fix the OBDII code B2123 Dodge (Ignition Run Control Circuit High)?

- While some DIY enthusiasts may be able to diagnose and repair this code, it is recommended to seek assistance from a professional mechanic, especially for complex electrical issues.

9. Will resetting the Check Engine light remove the OBDII code B2123 Dodge (Ignition Run Control Circuit High)?

- Simply resetting the Check Engine light will not fix the underlying issue causing the code. It is important to diagnose and repair the root cause of the problem to prevent it from reoccurring.

10. What are the long-term effects of ignoring OBDII code B2123 Dodge (Ignition Run Control Circuit High)?

- Ignoring this code can lead to more severe issues with your vehicle's ignition system, potentially causing further damage and safety risks. It is important to address the problem promptly to avoid costly repairs in the future.