2C3D - P2243

2020 BMW 128i Coupe (E82) L6-3.0L (N51) Diagnostic Trouble Codes ( DTC ): Service instruction

none

2C3D - P2243 (DME)

2C3D - P2243

Information saved in

DME

Fault code

2C3D - P2243

Fault text

Oxygen sensor before catalytic converter, line fault

Fault description

O2 Sensor Reference Voltage Circuit/Open (Bank 1 Sensor 1)

Condition for fault identification

Test condition:

O2 sensor wiring monitor (heater)

O2 sensor temperature is too low and the sensor signal is implausible

No fault memories

Terminal condition: Terminal 15, engine on Voltage condition:

none

Condition for fault memory entry

Sensor temperature < 680 锟斤拷C and sensor voltage < 0.2 V with oscillator deactivated

Action in service

Visual inspection of wires, DME plug and O2 sensor for damage

Inspect wires

Check plug-in connections DME <=> Wiring harness

<=> Upstream (pre-cat) O2 sensor for Bank 1 (water or corrosion in plug?) => Repeatedly disconnect the plug and then FIRMLY press it back in)

Replace O2 sensor

Replace DME

Fault effect and breakdown warning

Driver information Warning light: MIL ON