B1928 – Air Bag Safing Sensor Output Circuit Failure

The ODBII code B1928 indicates a failure in the airbag safing sensor output circuit, which is responsible for determining whether the airbag should deploy in the event of a collision.

The severity of ODBII code B1928 is typically considered moderate to high.

Common Causes For: B1927 Passenger Side Airbag Fault

• Faulty airbag safing sensor
• Damaged wiring or connectors
• Poor electrical connections
• Short circuit in the circuit
• Open circuit in the circuit
• Corrosion in connectors
• Faulty airbag control module
• Software issues in the airbag system

Common misdiagnosis for B1928 Air Bag Safing Sensor Output Circuit Failure

• Faulty airbag module
• Defective airbag sensor
• Wiring issues or shorts in the airbag system
• Faulty seat belt pretensioner
• Malfunctioning crash sensor
• Issues with the airbag control unit
• Battery or power supply problems affecting the airbag system

Common Troubleshooting Steps

When dealing with OBD-II code B1928, which indicates an “Air Bag Safing Sensor Output Circuit Failure,” it’s important to follow a systematic approach to troubleshoot the issue. Here are common troubleshooting steps:

• Scan Tool Verification:
• Use an OBD-II scanner to confirm the presence of the B1928 code. Check for any other related codes that may provide additional context.
• Visual Inspection:
• Inspect the airbag system wiring and connectors, especially those related to the safing sensor. Look for signs of damage, corrosion, or loose connections.
• Check the condition of the airbag module and any related components.
• Check the Safing Sensor:
• The safing sensor is designed to detect a collision and send a signal to deploy the airbag. Ensure that the sensor is properly mounted and not damaged.
• If possible, test the safing sensor using a multimeter to check for proper resistance and functionality.
• Inspect the Airbag Control Module:
• Check the airbag control module for any signs of damage or corrosion. Ensure that it is securely connected and that the connectors are clean and free of debris.
• Wiring Continuity and Resistance Tests:
• Perform continuity tests on the wiring between the safing sensor and the airbag control module. Look for any breaks or shorts in the wiring.
• Measure the resistance of the circuit to ensure it is within the manufacturer’s specifications.
• Check for Ground Issues:
• Ensure that the safing sensor and airbag control module have a good ground connection. Poor grounding can lead to circuit failures.
• Clear Codes and Test Drive:
• After performing the above checks and repairs, clear the trouble codes using the OBD-II scanner.
• Take the vehicle for a test drive to see if the code reappears.
• Consult Manufacturer Specifications:
• Refer to the vehicle’s service manual for specific diagnostic procedures and specifications related to the airbag system and safing sensor.
• Professional Diagnosis:
• If the issue persists after performing the above steps, consider seeking help from a professional technician or an automotive specialist with experience in airbag systems.
• Replacement:
• If the safing sensor or airbag control module is found to be faulty, replace the component as necessary. Always remember to follow safety precautions when working with airbag systems, as they can be dangerous if mishandled. If you’re unsure or uncomfortable with any step, it’s best to consult a professional.