P0041
O2 Sensor Signals Swapped Bank 1 Sensor 2 / Bank 2 Sensor 2
1999-2000 BMW 323i E46 2.5L I6 🇩🇪
Moderate SeverityPowertrain
Description
The downstream O2 sensor signals for Bank 1 and Bank 2 appear to be swapped.
Symptoms
- Check Engine Light
- Incorrect catalyst monitoring
- Failed emissions
Common Causes
- Sensor connectors swapped
- Wiring crossed after service
Diagnostic Steps
- Verify downstream sensor connections
- Trace wiring to PCM
Repair Notes
Correct the sensor connector routing.
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
P0041 on Other Vehicles
Common Questions
What does code P0041 mean on a 1999-2000 BMW 323i E46?
P0041 stands for "O2 Sensor Signals Swapped Bank 1 Sensor 2 / Bank 2 Sensor 2". The downstream O2 sensor signals for Bank 1 and Bank 2 appear to be swapped.
What are the symptoms of P0041 on a BMW 323i E46?
Common symptoms of P0041 include: Check Engine Light, Incorrect catalyst monitoring, Failed emissions.
What causes P0041 on a 1999-2000 BMW 323i E46?
Common causes of P0041 include: Sensor connectors swapped, Wiring crossed after service.