2020 BMW 128i Coupe (E82) L6-3.0L (N51) Diagnostic Trouble Codes ( DTC ): Service instruction
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2C3E - P2247 (DME)
2C3E - P2247
Information saved in
DME
Fault code
2C3E - P2247
Fault text
Oxygen sensor before catalytic converter 2, line fault
Fault description
O2 Sensor Reference Voltage Circuit/Open (Bank 2 Sensor 1)
Condition for fault identification
Test condition:
O2 sensor wiring monitor O2 sensor signal freezes. No fault memories
Drive at 50 - 80 km/h at moderate engine speed Terminal condition: Terminal 15, engine on Voltage condition:
none
Condition for fault memory entry
Voltage seizes at 2V (Lambda = 1) OR voltage < 2.1 V with overrun injection deactivation active
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 remove the plug and then reconnect it FIRMLY)
Check catalytic converter (is FSD lean fault entered for the other bank?)
Piston rings, injectors, positive crankcase ventilation OK? FSD fault? Then continue there!
Replace O2 sensor
Replace DME
Fault effect and breakdown warning
Driver information Warning light: MIL ON
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