2020 BMW 128i Coupe (E82) L6-3.0L (N51) Diagnostic Trouble Codes ( DTC ): Service instruction
none
2C9D - P0052 (DME)
2C9D - P0052
Information saved in
DME
Fault code
2C9D - P0052
Fault text
Oxygen sensor heating before catalytic converter 2, activation
Fault description
HO2S Heater Control Circuit High (Bank 2 Sensor 1)
Condition for fault identification
Test condition:
Driver circuit diagnosis for O2 sensor heater UBatt > 10V
Sensors installed No fault memories
Terminal condition: Terminal 15, engine on Voltage condition:
none
Condition for fault memory entry
Active immediately after terminal 15 change; electr. faults entered within a few seconds
Action in service
Visual inspection of wires, DME plug and O2 sensor for damage
Check wires
Check plug-in connections DME <=> Wiring harness
<=> Upstream O2 sensor forward of catalyst for Bank 2
Replace O2 sensor
Replace DME
Fault effect and breakdown warning
Driver information Warning light: MIL ON
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