DTC P2243 BMW
O2 Sensor Reference Voltage Circuit Open Bank 1 Sensor 1
O2 Sensor Reference Voltage Circuit Open Bank 1 Sensor 1
Description
Engine started, battery voltage must be at least 11.5v, all electrical components must be off, parking brake must be engaged (to keep daytime driving lights off), automatic transmission selector must be in park. The DME detected an unexpected voltage cond
Cause and Solution
Oxygen sensor (before catalytic converter) is faulty
Oxygen sensor heater (before catalytic converter) is faulty
Oxygen sensor heater (before catalytic converter) is faulty
Oxygen sensor heater (behind catalytic converter) is faulty
Video Guide
Diagnostic Info
- DTC Code: P2243
- Brand: BMW