P3018

2C4D - P3018

Information saved in
DME

Fault code
2C4D - P3018

Fault text
Oxygen sensor before catalytic converter, pump current
cable

Fault description
O2 Sensor Lambda Controller Value Above Threshold due
to Open Pumping Current Circuit (Bank 1 Sensor 1)

Condition for fault identification
Test condition:
Monitoring on disconnected pump current wire (IP);
Diagnosis conditions:
- Closed-loop lambda control active and control deviation >
10 %
- Voltage at CJ125 at 1.5 V (1.49?.1.51V)
- Forced amplitude active
Terminal condition: Engine operation, part load
Voltage condition:
battery voltage<11V oder Ubatt > 16 volts

Condition for fault memory entry
Fault monitoring criterion must remain present over 3 sec.

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

Fault effect and breakdown warning


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

Service instruction
none