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Engine-Codes – Generic – B1919

B1919 Code - Air Bag Memory Clear Circuit Short To Battery

Quick Answer

The diagnostic trouble code B1919 indicates that there is a short circuit between the airbag memory clear circuit and the battery in the vehicle's airbag system. Common causes include Damaged wiring or connectors in the airbag system, Faulty airbag control module, Short circuit between the memory clear circuit and the battery. 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
B1919 indicates Air Bag Memory Clear Circuit Short To Battery.
Common causes
Common causes include Damaged wiring or connectors in the airbag system, Faulty airbag control module, Short circuit between the memory clear circuit and the battery.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code B1919 Description

The diagnostic trouble code B1919 indicates that there is a short circuit between the airbag memory clear circuit and the battery in the vehicle's airbag system. When this code is triggered, it means that there is an issue with the communication between the airbag control module and the memory clear circuit, which is responsible for storing and retrieving crash data. This can potentially compromise the effectiveness of the airbag system in the event of a collision, putting the driver and passengers at risk.

OBDII Code B1919 - Air Bag Memory Clear Circuit Short To Battery
B1919 Code - Air Bag Memory Clear Circuit Short To Battery

Common Causes of B1919

  1. Damaged wiring or connectors in the airbag system
  2. Faulty airbag control module
  3. Short circuit between the memory clear circuit and the battery
  4. Corrosion or water damage in the airbag system components

Symptoms of B1919

  1. Airbag warning light illuminated on the dashboard
  2. Inability to clear airbag codes from the system
  3. Airbags not deploying in a collision
  4. Intermittent or erratic airbag system behavior

How to Fix B1919

  1. Begin by diagnosing the specific cause of the short circuit using a diagnostic scanner and multimeter.
  2. Inspect the wiring and connectors in the airbag system for any signs of damage or corrosion. Repair or replace any damaged components.
  3. Check the airbag control module for faults and replace if necessary.
  4. Clear the airbag memory codes and reset the system to ensure proper functionality.
  5. Perform a thorough test of the airbag system to verify that the issue has been resolved and that the airbags deploy as intended.

Cost to Fix B1919

The typical repair costs for addressing a B1919 code can vary depending on the specific cause of the issue and the extent of the damage. In general, the cost of parts and labor for repairing an airbag system fault can range from $200 to $800. However, it's important to note that the actual cost may be higher if the airbag control module needs to be replaced or if there are additional underlying issues in the system. Additionally, diagnostic time and labor rates at auto repair shops can vary, so it's recommended to consult with a professional for a more accurate estimate based on your specific vehicle and location.

Need more information about the B1919 code?

Need more information on how to fix the B1919 code? Get Access to Factory Service Manuals

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Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

  • Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
  • Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
  • Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
  • Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

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 B1919 Code

1. What does the OBDII code B1919 mean?

The code B1919 indicates an "Air Bag Memory Clear Circuit Short To Battery," meaning there is an electrical issue in the circuit responsible for resetting the airbag control module.

2. What are the common symptoms of code B1919?

Symptoms may include the airbag warning light staying on, inability to clear airbag fault codes, and potential functionality issues with the airbag system.

3. What causes the B1919 code to appear?

Common causes include damaged wiring, a short circuit to the battery, a faulty airbag control module, or a malfunctioning memory clear circuit.

4. Is it safe to drive with the B1919 code active?

No, it’s not safe, as the airbag system may not function properly in the event of an accident, increasing the risk of injury.

5. How can a technician diagnose the B1919 code?

A technician will inspect the airbag memory clear circuit, check for damaged or shorted wiring, test the airbag control module, and use a scan tool to confirm the fault.

6. Can I clear the B1919 code myself?

Clearing the code requires addressing the root cause first, such as repairing damaged wiring or replacing faulty components. Simply erasing the code without fixing the issue will not resolve the problem.

7. How much does it cost to fix the B1919 code?

The repair cost varies depending on the issue, ranging from $100-$500 for wiring repairs to $500 or more if the airbag control module needs replacement.

8. Can a blown fuse cause the B1919 code?

While a blown fuse is less likely to cause this specific code, it’s important to check all fuses related to the airbag system during diagnosis.

9. What tools are needed to fix the B1919 code?

Tools may include a multimeter for testing circuits, a scan tool for reading and clearing codes, and a wiring diagram to trace the circuit.

10. What happens if the B1919 code isn’t fixed?

If left unresolved, the airbag system may remain nonfunctional, putting occupants at risk in the event of a collision.

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