2C3E - P2629

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

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2C3E - P2629 (DME)

2C3E - P2629

Information saved in

DME

Fault code

2C3E - P2629

Fault text

Oxygen sensor before catalytic converter 2, line fault

Fault description

O2 Sensor Pumping Current Trim Circuit/Open (Bank 2 Sensor 1)

Condition for fault identification

Test condition:

O2 sensor wire monitoring

Voltage of O2 sensor signal is too high during overrun cut- off phase.

overrun injection deactivation

Terminal condition: Terminal 15, engine on Voltage condition:

none

Condition for fault memory entry

Voltage >5.8 V during overrun injection deactivation

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