B0030critical severityBody
Front Impact Sensor Circuit - Left
on 2004 Subaru Legacy 3.0L H6 · AWD
What this code means
Malfunction detected in the left front impact sensor circuit. This sensor detects frontal crash severity on the driver side.
Symptoms
- Airbag warning light on
- SRS fault stored
- Frontal airbag system may not function
- No driving symptoms
Common causes
- Faulty front impact sensor
- Wiring damage from front collision
- Connector corrosion from road splash
- Sensor mounting bracket loose
Diagnostic steps
- Scan SRS codes
- Inspect left front impact sensor mounting
- Check wiring to sensor
- Measure sensor circuit resistance
- Verify sensor bracket integrity
Repair notes
Replace front impact sensor or repair wiring. Sensor is typically mounted in the front fender or bumper support area.
Other Body codes on this vehicle
B0001
Driver Frontal Stage 1 Deployment Control
B0002
Driver Frontal Stage 2 Deployment Control
B0003
Passenger Frontal Stage 1 Deployment Control
B0004
Passenger Frontal Stage 2 Deployment Control
B0005
Driver Knee Airbag Deployment Circuit
B0006
Passenger Knee Airbag Deployment Circuit
B0010
Driver Side Airbag Deployment
B0011
Driver Side Airbag Deployment Circuit Open
B0012
Driver Side Airbag Deployment Circuit Short to Ground
B0013
Driver Side Airbag Deployment Circuit Short to Battery