AutoCodes – RAM – B2122 RAM

B2122 RAM Code - Ignition Run Control Circuit Low

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: B2122 RAM indicates Ignition Run Control Circuit Low.
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 825

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 B2122 RAM 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 open or shorted to ground.

OBDII Code B2122 RAM - Ignition Run Control Circuit Low - AutoCodes.com — B2122 RAM Code - Ignition Run Control Circuit Low

What does this mean?

What are the Possible Causes of the DTC B2122 RAM?

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 B2122 RAM?

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 B2122 RAM 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 B2122 RAM Code

1. What are common symptoms of OBDII code B2122 RAM (Ignition Run Control Circuit Low)?

- Common symptoms include difficulty starting the vehicle, engine stalling, and a check engine light illuminated on the dashboard.

2. What can cause the OBDII code B2122 RAM to trigger?

- The code B2122 RAM is typically triggered by a malfunction in the ignition run control circuit, which can be caused by wiring issues, a faulty ignition switch, or a defective ignition run relay.

3. How can I diagnose the cause of OBDII code B2122 RAM?

- Diagnosing the code may involve checking the wiring and connections in the ignition run control circuit, testing the ignition switch, and verifying the operation of the ignition run relay using a multimeter.

4. Can I still drive my vehicle with the OBDII code B2122 RAM present?

- It is not recommended to drive your vehicle with the code B2122 RAM present, as it can lead to unreliable engine starting and potential stalling, posing a safety risk.

5. How can I repair OBDII code B2122 RAM (Ignition Run Control Circuit Low)?

- Repairing the code may involve repairing or replacing damaged wiring, replacing a faulty ignition switch, or replacing a defective ignition run relay to restore proper functionality.

6. Is it possible to reset the OBDII code B2122 RAM without fixing the underlying issue?

- While clearing the code may temporarily turn off the check engine light, the underlying issue causing the code will persist until properly diagnosed and repaired.

7. Are there any preventive maintenance measures to avoid OBDII code B2122 RAM in the future?

- Regularly inspecting and maintaining the ignition system components, such as the wiring, ignition switch, and relay, can help prevent issues that may trigger the B2122 RAM code.

8. Can extreme weather conditions affect the ignition run control circuit and trigger OBDII code B2122 RAM?

- Yes, extreme weather conditions such as extreme cold or heat can affect the performance of the ignition system components, potentially leading to issues that trigger the B2122 RAM code.

9. Will OBDII code B2122 RAM affect the overall performance of my vehicle?

- Yes, the B2122 RAM code can affect the overall performance of your vehicle by causing starting issues, engine stalling, and potentially impacting drivability.

10. How long does it typically take to repair OBDII code B2122 RAM?

- The time to repair the B2122 RAM code can vary depending on the underlying cause and complexity of the repair, but it may take a few hours to a full day for diagnosis and repair.