Lack of HO2S Switch — Adaptive Fuel at Limit (Bank 1)
2011-2015 Ford Explorer 3.5L V6 🇨🇦
Description
The upstream heated oxygen sensor on Bank 1 is not switching properly between rich and lean, and the adaptive fuel strategy has reached its correction limit. The PCM can no longer compensate for the condition.
Symptoms
- Check Engine Light
- Poor fuel economy
- Rough idle
- Hesitation
- Failed emissions test
Common Causes
- Large vacuum leak
- Faulty HO2S sensor Bank 1
- Exhaust leak near sensor
- Fuel system issue (low pressure, leaking injector)
- MAF sensor malfunction
Diagnostic Steps
- Check for vacuum leaks with smoke test
- Monitor O2 sensor switching on scan tool
- Check fuel pressure
- Inspect for exhaust leaks near O2 sensor
- Check MAF sensor readings
Repair Notes
Repair vacuum leaks. Replace O2 sensor if not switching. Check fuel system.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
P1130 on Other Vehicles
Common Questions
What does code P1130 mean on a 2011-2015 Ford Explorer?
P1130 stands for "Lack of HO2S Switch — Adaptive Fuel at Limit (Bank 1)". The upstream heated oxygen sensor on Bank 1 is not switching properly between rich and lean, and the adaptive fuel strategy has reached its correction limit. The PCM can no longer compensate for the condition.
What are the symptoms of P1130 on a Ford Explorer?
Common symptoms of P1130 include: Check Engine Light, Poor fuel economy, Rough idle, Hesitation, Failed emissions test.
What causes P1130 on a 2011-2015 Ford Explorer?
Common causes of P1130 include: Large vacuum leak, Faulty HO2S sensor Bank 1, Exhaust leak near sensor, Fuel system issue (low pressure, leaking injector), MAF sensor malfunction.