AutoCodes – Chrysler – B2124 Chrysler

B2124 Chrysler Code - Ignition Run Control Circuit Open

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: B2124 Chrysler indicates Ignition Run Control Circuit Open.
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 5,858

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 19, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2124 Chrysler Description

The Front Control Module monitors the Ignition Run Control Circuit. The Front Control Module will set this DTC within 500ms if the run relay control circuit voltage is open or shorted to ground.

OBDII Code B2124 Chrysler - Ignition Run Control Circuit Open - AutoCodes.com — B2124 Chrysler Code - Ignition Run Control Circuit Open

What does this mean?

What are the Possible Causes of the DTC B2124 Chrysler?

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 B2124 Chrysler?

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 B2124 Chrysler 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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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 B2124 Chrysler Code

1. What are common symptoms of OBDII code B2124 Chrysler (Ignition Run Control Circuit Open)?

- Common symptoms include the engine not starting, intermittent starting issues, and the vehicle stalling while driving.

2. What causes the OBDII code B2124 Chrysler to trigger?

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

3. How can I diagnose the Ignition Run Control Circuit Open issue?

- Diagnosing the issue involves using a scan tool to read the OBDII codes, checking the wiring and connections related to the ignition system, and testing the ignition switch and relay for proper functionality.

4. Can I still drive my vehicle with the B2124 code present?

- It is not recommended to drive the vehicle with the B2124 code present, as it can lead to potential safety hazards and further damage to the ignition system.

5. How can I repair the Ignition Run Control Circuit Open issue?

- Repairing the issue may involve repairing or replacing damaged wiring, replacing a faulty ignition switch or relay, or addressing any other underlying issues causing the circuit to be open.

6. Will resetting the OBDII code B2124 make it go away permanently?

- Simply resetting the code may temporarily clear it, but if the underlying issue causing the code is not addressed and repaired, the code is likely to reappear.

7. Can a DIY enthusiast fix the B2124 code issue at home?

- Depending on the individual's skill level and access to tools, a DIY enthusiast may be able to diagnose and repair the Ignition Run Control Circuit Open issue at home. However, professional assistance may be necessary for more complex repairs.

8. How much does it cost to repair the Ignition Run Control Circuit Open issue?

- The cost of repairs can vary depending on the extent of the issue and the specific components that need to be repaired or replaced. It is recommended to obtain quotes from automotive professionals for a more accurate estimate.

9. Is the B2124 code specific to Chrysler vehicles only?

- The B2124 code is specific to Chrysler vehicles and indicates an issue with the Ignition Run Control Circuit. Other vehicle manufacturers may have different codes for similar issues.

10. How can I prevent the OBDII code B2124 from occurring in the future?

- Regular maintenance of the ignition system, including checking the wiring and connections, can help prevent issues that may trigger the B2124 code. Additionally, addressing any ignition system problems promptly can help prevent the code from occurring in the future.