BMW P1111: O2 Control (Bank 1) System Too Lean
Is your scanner showing BMW P1111?
No worries. We'll show you what it means and how to deal with it.
BMW P1111: O2 Control (Bank 1) System Too Lean
OVERVIEWWhat Does The BMW P1111 Code Mean?
Engine started, battery voltage must be at least 11.5v, all electrical components must be off, the ground between the engine and the chassis must be well connected, the exhaust system must be properly sealed between the catalytic converter and the cylinde
What Are The Potential Causes Of The BMW P1111 Code?
Below are some potential causes of this DTC:
- Oxygen sensor (before catalytic converter) is faulty
- Oxygen sensor (behind catalytic converter) is faulty
- Oxygen sensor heater (before catalytic converter) is faulty
- Oxygen sensor heater (behind catalytic converter) is faulty
- Circuit wiring
Recommended Parts
Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:
>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> Bosch 13477 Premium Original Equipment Oxygen Sensor
Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!
Reference Sources
BMW P1111, DTCDECODE.
