Thursday, August 29, 2019

2C3E - P2247

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



none









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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