P1150
Lack of HO2S Switch — Adaptive Fuel at Limit (Bank 2)
2012-2020 Ford Focus 2.0L I4
Moderate SeverityPowertrain
Description
The upstream heated oxygen sensor on Bank 2 is not switching properly, and the adaptive fuel strategy has reached its correction limit on Bank 2.
Symptoms
- Check Engine Light
- Poor fuel economy
- Rough idle
- Failed emissions
Common Causes
- Large vacuum leak affecting Bank 2
- Faulty O2 sensor Bank 2
- Exhaust leak near Bank 2 sensor
- Fuel delivery issue Bank 2
Diagnostic Steps
- Check for vacuum leaks on Bank 2 side
- Monitor O2 sensor switching
- Check fuel pressure
- Inspect exhaust for leaks
Repair Notes
Repair vacuum or exhaust leaks. Replace O2 sensor if not switching.
Related Codes
P0174System Too Lean Bank 2P1151Lack of HO2S Switch — Sensor Indicates Lean (Bank 2)P1151Lack of HO2S Switch — Sensor Indicates Lean (Bank 2)P1151Accelerator Pedal Position Sensor 2 Circuit MalfunctionP1151Lack of HO2S Switch — Sensor Indicates Lean (Bank 2)P1151Accelerator Pedal Position Sensor 2 Circuit MalfunctionP1151Accelerator Pedal Position Sensor 2 Circuit MalfunctionP1152Lack of HO2S Switch — Sensor Indicates Rich (Bank 2)P1152Lack of HO2S Switch — Sensor Indicates Rich (Bank 2)P1152Lack of HO2S Switch — Sensor Indicates Rich (Bank 2)
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
P1150 on Other Vehicles
Common Questions
What does code P1150 mean on a 2012-2020 Ford Focus?
P1150 stands for "Lack of HO2S Switch — Adaptive Fuel at Limit (Bank 2)". The upstream heated oxygen sensor on Bank 2 is not switching properly, and the adaptive fuel strategy has reached its correction limit on Bank 2.
What are the symptoms of P1150 on a Ford Focus?
Common symptoms of P1150 include: Check Engine Light, Poor fuel economy, Rough idle, Failed emissions.
What causes P1150 on a 2012-2020 Ford Focus?
Common causes of P1150 include: Large vacuum leak affecting Bank 2, Faulty O2 sensor Bank 2, Exhaust leak near Bank 2 sensor, Fuel delivery issue Bank 2.