AutoCodes – Generic – B212D

B212D 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 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 6,617
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 19, 2019
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Code B212D 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 - Ignition Run Only Input Circuit Open - AutoCodes.com
B212D Code - Ignition Run Only Input Circuit Open

What are the Possible Causes of the DTC B212D?

  • 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?

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 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 B212D code?

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Need Help with the Code?

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Information for Specific Makes

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 Code

1. What are the common symptoms of OBDII code B212D (Ignition Run Only Input Circuit Open)?

- The common symptoms include the engine stalling or difficulty starting, the vehicle not running smoothly, and the check engine light being illuminated.

2. What are some possible causes of the Ignition Run Only Input Circuit Open error code?

- Possible causes include damaged wiring or connectors in the ignition run only input circuit, a faulty ignition switch, or a malfunctioning body control module.

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

- You can diagnose this issue by using an OBDII scanner to retrieve the specific error code, visually inspecting the wiring and connectors related to the ignition system, and testing the components for proper functionality.

4. Is it safe to continue driving with the B212D error code present?

- It is not recommended to drive with the B212D error code present, as it can lead to further damage to the vehicle and potentially unsafe driving conditions.

5. Can I repair the Ignition Run Only Input Circuit Open issue myself?

- Depending on your level of automotive knowledge and experience, you may be able to repair the issue yourself by identifying and fixing any damaged wiring or connectors. However, professional assistance is recommended for more complex repairs.

6. How much does it typically cost to repair the B212D error code?

- The cost of repairing the Ignition Run Only Input Circuit Open issue can vary depending on the root cause of the problem, the extent of the damage, and whether you choose to repair it yourself or seek professional help.

7. Will resetting the error code make it go away permanently?

- Resetting the error code may temporarily turn off the check engine light, but if the underlying issue causing the B212D code is not fixed, the code is likely to reappear after driving the vehicle for some time.

8. Can a faulty ignition switch cause the B212D error code?

- Yes, a faulty ignition switch is one of the possible causes of the Ignition Run Only Input Circuit Open error code (B212D), as it can disrupt the communication between the ignition system components.

9. What is the purpose of the Ignition Run Only Input Circuit in a vehicle?

- The Ignition Run Only Input Circuit is responsible for providing the necessary signals to the vehicle's control modules to allow the engine to start and run properly.

10. Are there any preventive measures to avoid encountering the B212D error code?

- To prevent encountering the B212D error code, it's important to regularly inspect and maintain the electrical components in the ignition system, such as wiring, connectors, and the ignition switch, to ensure they are in good working condition.

2. What can cause the OBDII code B212D to trigger?

- The code B212D can be triggered by a faulty ignition switch, damaged wiring, or a defective ignition run only input circuit.

3. How serious is the OBDII code B212D?

- The code B212D is considered a moderate issue that may cause inconvenience and potentially affect the vehicle's drivability.

4. Can I continue driving with the OBDII code B212D present?

- It is not recommended to continue driving with the code B212D present, as it may lead to further damage or safety hazards.

5. How can I diagnose the cause of the OBDII code B212D?

- Diagnosing the code B212D involves using a diagnostic scanner to retrieve the code, checking the ignition switch and related wiring for any damage, and testing the circuit for continuity.

6. What are some repair tips for fixing the OBDII code B212D?

- Repair tips include inspecting and repairing any damaged wiring, replacing the faulty ignition switch if necessary, and clearing the code with a diagnostic scanner.

7. Can I reset the OBDII code B212D without fixing the underlying issue?

- While you can clear the code temporarily, it is important to address the underlying issue to prevent the code from reoccurring and ensure the vehicle's proper operation.

8. How much does it typically cost to repair the OBDII code B212D?

- The cost of repairing the code B212D can vary depending on the cause of the issue, but it may range from around $100 to $300 for parts and labor.

9. Is the OBDII code B212D specific to certain vehicle makes and models?

- The code B212D may be specific to certain vehicle makes and models that use OBDII systems, so it is recommended to consult the vehicle's service manual for more information.

10. How long does it usually take to repair the OBDII code B212D?

- The repair time for the code B212D can vary depending on the complexity of the issue, but it typically takes a few hours to diagnose and fix the problem.

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