2C9F - P0057 (DME)

2C9F - P0057

Information saved in
DME

Fault code
2C9F - P0057

Fault text
Oxygen sensor heating behind catalytic converter 2,
activation

Fault description
HO2S Heater Control Circuit Low (Bank 2 Sensor 2)

Condition for fault identification
Test condition:
Diagnostic voltage (max) at power stage
Terminal condition: heater
engine speed
battery voltage
Voltage condition:
Battery voltage
11V < battery voltage < 16V

Condition for fault memory entry
U > 3.59 V and heater on

Action in service
Check/replace components and wiring

Fault effect and breakdown warning


Driver information
Warning light:
MIL on in 2nd driving cycle

Service instruction
none