AutoCodes – RAM – B212D RAM

B212D RAM Code - Ignition Run Only Input Circuit Open

Quick Answer

The Occupant Classification Module (OCM) monitors the Ignition Run/Start Input 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: B212D RAM indicates Ignition Run Only Input 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 901

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 B212D RAM Description

The Occupant Classification Module (OCM) monitors the Ignition Run/Start Input Circuit. The OCM sets the OBDII codes if the voltage on the Fused Run Relay Output circuit drops below 6.0 volts.

OBDII Code B212D RAM - Ignition Run Only Input Circuit Open - AutoCodes.com — B212D RAM Code - Ignition Run Only Input Circuit Open

What does this mean?

What are the Possible Causes of the DTC B212D RAM?

Faulty Run Relay
Run Relay harness is open or shorted
Run Relay circuit poor electrical connection
Faulty Occupant Classification Module (OCM)

How to Fix the DTC B212D 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 B212D 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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Need Help with the Code?

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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 B212D RAM Code

1. What are the common symptoms of OBDII code B212D RAM?

- The common symptoms of this code include issues with starting the vehicle, intermittent stalling, and the engine running rough.

2. What does the OBDII code B212D RAM indicate?

- The code B212D RAM indicates that there is an open circuit detected in the ignition run only input circuit.

3. What are the possible causes of the ignition run only input circuit open issue?

- Possible causes of this issue include a faulty ignition switch, damaged wiring or connectors in the ignition system, or a defective PCM (powertrain control module).

4. How can I diagnose the ignition run only input circuit open problem?

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

5. Can the OBDII code B212D RAM be cleared/reset, or does it require immediate repair?

- The code can be cleared/reset using a diagnostic scanner, but it is important to address the underlying issue causing the code to prevent further problems with the vehicle's ignition system.

6. Are there any repair tips for fixing the ignition run only input circuit open problem?

- Repair tips include checking and repairing any damaged wiring or connectors, replacing the faulty ignition switch if necessary, and ensuring proper connection to the PCM.

7. How serious is the OBDII code B212D RAM?

- While the code may not cause immediate harm to the vehicle, it can lead to starting and stalling issues if left unresolved. It is recommended to address the issue promptly.

8. Can I drive my vehicle with the ignition run only input circuit open issue?

- It is not advisable to drive the vehicle with this issue, as it may lead to unpredictable engine behavior and potential stalling, which can be dangerous.

9. Will the check engine light turn off on its own after repairing the ignition run only input circuit open problem?

- In most cases, after repairing the issue causing the code, the check engine light should turn off on its own. If it doesn't, you may need to clear the code using a diagnostic scanner.

10. How much does it typically cost to repair the ignition run only input circuit open problem?

- The cost of repair can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor, excluding diagnostic fees.