B1905: Air Bag Crash Sensor #2 Feed/Return Circuit Short To Battery
CriticalBodyRestraint System
What does B1905 mean?
B1905 is a diagnostic trouble code indicating "Air Bag Crash Sensor #2 Feed/Return Circuit Short To Battery". The ECU is detecting a voltage reading that is below the expected range in the restraint system circuit. This typically points to a wiring short, a faulty sensor, or a grounding issue.
Common causes
- Damaged or corroded wiring harness
- Loose or disconnected electrical connector
- Failed restraint system sensor or actuator
- Blown fuse in the related circuit
- Poor ground connection
What should you do?
This is a critical issue. Stop driving as soon as it is safe to do so and have the vehicle inspected immediately. Continuing to drive could cause further damage or pose a safety risk.
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Code B1905 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.