B1000low severityBody
TPMS Sensor Circuit - Left Front
on 2009 Subaru Legacy 2.5L H4 · AWD
What this code means
Malfunction in the left front tire pressure monitoring sensor. The sensor is not transmitting or transmitting invalid data.
Symptoms
- TPMS warning light on
- Left front tire pressure not displayed
- Tire pressure shows dashes
- Low tire pressure warning may be false
Common causes
- Dead TPMS sensor battery
- Faulty TPMS sensor
- Sensor damaged during tire service
- Aftermarket wheel without sensor
- Sensor not programmed to vehicle
Diagnostic steps
- Check if sensor is programmed to vehicle
- Trigger sensor with TPMS tool
- Check sensor battery status
- Inspect sensor for physical damage
- Verify sensor frequency matches vehicle
Repair notes
Replace TPMS sensor and program to vehicle. Ensure tire shop installs sensor during tire service.
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
B0007
Rear Left Side Airbag Deployment Circuit
B0008
Rear Right Side Airbag Deployment Circuit
B0010
Driver Side Airbag Deployment
B0011
Driver Side Airbag Deployment Circuit Open