Lack of HO2S Switch — Adaptive Fuel at Limit (Bank 2)
2000-2006 Lincoln LS 3.0L V6
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
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
Lincoln Aviator
2003-2005 4.6L V8
Lincoln Aviator
2003-2005 4.6L V8 DOHC
Lincoln Aviator
2020-2024 3.0L Twin-Turbo V6
Lincoln Aviator
2020-2024 3.0L V6 Twin Turbo
Lincoln Aviator Grand Touring
2020-2024 3.0L Twin Turbo V6 PHEV
Lincoln Aviator Grand Touring
2020-2024 3.0L Twin-Turbo V6 Hybrid
Lincoln Aviator Grand Touring
2020-2024 3.0L V6 Twin Turbo Hybrid
Lincoln Blackwood
2002-2002 5.4L V8
Common Questions
What does code P1150 mean on a 2000-2006 Lincoln LS?
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 Lincoln LS?
Common symptoms of P1150 include: Check Engine Light, Poor fuel economy, Rough idle, Failed emissions.
What causes P1150 on a 2000-2006 Lincoln LS?
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.