P0176low severityPowertrain
Fuel Composition Sensor Circuit
on 1999 Subaru Outback 2.2L H4 · AWD
What this code means
Malfunction in the fuel composition sensor circuit, used in flex-fuel vehicles to detect ethanol content.
Symptoms
- Check Engine Light
- Poor driveability on E85
- Incorrect fueling for fuel type
Common causes
- Faulty fuel composition sensor
- Wiring damage
- Sensor contamination
Diagnostic steps
- Test sensor output
- Inspect wiring
- Check for contamination
Repair notes
Replace fuel composition sensor.
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