P0132moderate severityPowertrain
O2 Sensor Circuit High Voltage Bank 1 Sensor 1
on 2004 Subaru Legacy 3.0L H6 · AWD
What this code means
The upstream O2 sensor voltage on Bank 1 is staying above 0.45V, indicating a rich condition or sensor fault.
Symptoms
- Check Engine Light
- Rich running
- Black exhaust smoke
- Poor fuel economy
Common causes
- Faulty O2 sensor
- Leaking fuel injector
- High fuel pressure
- EVAP purge valve stuck open
Diagnostic steps
- Monitor O2 sensor voltage
- Test fuel pressure
- Check for leaking injectors
- Inspect EVAP purge valve
Repair notes
Replace O2 sensor or fix rich-running cause.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1