Front Oxygen Sensor Circuit Malfunction Open
2012-2016 Subaru Impreza 2.0L H4
Description
The PCM has detected an open circuit condition in the front (upstream) oxygen sensor circuit. The sensor signal wire or heater circuit has a break, preventing the sensor from providing fuel control data to the PCM.
Symptoms
- Check Engine Light
- Engine runs in open loop
- Poor fuel economy
- Higher emissions
- Rough idle
Common Causes
- O2 sensor wiring open due to heat damage or corrosion
- Disconnected O2 sensor connector
- Faulty O2 sensor with open internal element
- Corroded connector pins
- Broken wire at sensor pigtail
Diagnostic Steps
- Check O2 sensor signal on scan tool (fixed voltage or no reading indicates open)
- Inspect O2 sensor connector for disconnection or corrosion
- Test O2 sensor signal wire continuity
- Check heater circuit resistance
- Inspect wiring for heat damage near exhaust
Repair Notes
Repair the open wiring or replace the front O2 sensor.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1130 on Other Vehicles
Common Questions
What does code P1130 mean on a 2012-2016 Subaru Impreza?
P1130 stands for "Front Oxygen Sensor Circuit Malfunction Open". The PCM has detected an open circuit condition in the front (upstream) oxygen sensor circuit. The sensor signal wire or heater circuit has a break, preventing the sensor from providing fuel control data to the PCM.
What are the symptoms of P1130 on a Subaru Impreza?
Common symptoms of P1130 include: Check Engine Light, Engine runs in open loop, Poor fuel economy, Higher emissions, Rough idle.
What causes P1130 on a 2012-2016 Subaru Impreza?
Common causes of P1130 include: O2 sensor wiring open due to heat damage or corrosion, Disconnected O2 sensor connector, Faulty O2 sensor with open internal element, Corroded connector pins, Broken wire at sensor pigtail.