2C76

2C76 - P0157

Information saved in
DME

Fault code
2C76 - P0157

Fault text
Oxygen sensor behind catalytic converter 2, signal

Fault description
O2 Sensor Circuit Low Voltage (Bank 2 Sensor 2)

Condition for fault identification
Test condition:
O2 sensor signal check
No fault memories;
Mass airflow exceeds 10 kg/h
Terminal condition: Terminal 15, engine on
Voltage condition:
none

Condition for fault memory entry
Bank 2 downstream (post-cat) O2 sensor voltage less than
0.02 V; internal resistance in circuit for downstream oxygen
sensor less than 10 ohms

Action in service
1. Check wiring
2. Check plugs
3. Resistance measurement
4. Measure voltage
5. Replace Bank 2 downstream (post-cat) O2 sensor

Fault effect and breakdown warning


Driver information
Warning light:
MIL ON

Service instruction
none