B1906 – OBD-II DTC

OBD-II DTC B1906 – Air Bag Crash Sensor #2 Feed/Return Circuit Short To Ground

DTC B1906 meaning

DTC B1906 refers to a diagnostic trouble code indicating a problem with the airbag system, specifically related to the crash sensor #2 feed/return circuit. This code suggests that there is a short circuit to ground in the wiring or components associated with the second crash sensor, which is crucial for the proper deployment of airbags during a collision.

DTC B1906 symptoms

Common symptoms associated with DTC B1906 may include:

• Illuminated airbag warning light on the dashboard
• Possible malfunction of the airbag system
• Increased risk of airbags not deploying in an accident
• Diagnostic scanner may show additional related codes

DTC B1906 causes

Several factors can lead to the occurrence of DTC B1906, including:

• Damaged wiring or connectors in the crash sensor circuit
• Faulty crash sensor #2
• Corrosion or poor connections in the airbag system
• Issues with the airbag control module
• Accidental grounding of the circuit

DTC B1906 seriousness

DTC B1906 is considered serious because it directly affects the airbag system’s functionality. If the crash sensor circuit is shorted to ground, the airbag may not deploy in the event of a collision, increasing the risk of injury to occupants. It is crucial to address this issue promptly to ensure the safety of the vehicle’s occupants.

How to diagnose DTC B1906

To diagnose DTC B1906, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC B1906.
2. Inspect the wiring and connectors related to crash sensor #2 for any visible damage or corrosion.
3. Check for continuity in the feed and return circuits of the crash sensor.
4. Test the crash sensor #2 using a multimeter to ensure it is functioning correctly.
5. Examine the airbag control module for any faults or issues.
6. Clear the DTC and perform a road test to see if the code returns.

How to fix DTC B1906 step-by-step instructions

To fix DTC B1906, follow these steps:

1. Disconnect the vehicle’s battery to ensure safety while working on the airbag system.
2. Inspect and repair any damaged wiring or connectors in the crash sensor #2 circuit.
3. If the crash sensor #2 is faulty, replace it with a new one.
4. Ensure all connections are secure and free from corrosion.
5. Reconnect the battery and use an OBD-II scanner to clear the DTC.
6. Perform a road test to verify that the airbag system is functioning correctly and that the DTC does not return.

How to erase DTC B1906

To erase DTC B1906, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the trouble codes section of the scanner.
4. Select the option to clear or erase the codes.
5. Confirm the action and wait for the scanner to indicate that the codes have been cleared.
6. Disconnect the scanner and perform a test drive to ensure the code does not reappear.

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