P0138

2C71 - P0138

Information saved in
DME

Fault code
2C71 - P0138

Fault text
Oxygen sensor behind catalytic converter

Fault description
O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)

Condition for fault identification
Test condition:
Oxygen sensor behind cat. heater on
Engine speed > 40 rpm
Battery voltage > 11V
Dew point end reached
Terminal condition: Terminal 15 on
Engine running
Voltage condition:
Battery voltage
11V < battery voltage < 16V

Condition for fault memory entry
Time
5 sec./continuous

Action in service
Check plugs/wiring harness, otherwise replace sensor

Fault effect and breakdown warning


Driver information
Warning light:
MIL on

Service instruction
none