B0223low severityBody
Heated Mirror Circuit
on 2004 Subaru Legacy 2.5L H4 · AWD
What this code means
Malfunction in the heated mirror circuit. The mirror defroster element is not functioning.
Symptoms
- Mirrors do not defrost
- Mirror stays fogged in cold/humid conditions
- Heated mirror indicator not working
Common causes
- Burnt out mirror heating element
- Faulty heated mirror switch
- Wiring damage
- Relay failure
- BCM output issue
Diagnostic steps
- Test heated mirror switch
- Check heated mirror relay
- Measure voltage at mirror heater connector
- Test heater element resistance
- Check BCM output
Repair notes
Replace mirror glass with integrated heater or repair wiring.
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