P3012

2C4B - P3012

Information saved in
DME

Fault code
2C4B - P3012

Fault text
Control module, internal fault: oxygen sensor module

Fault description
O2 Sensor Signal Circuit Adaptation Value Too High (Bank
1 Sensor 1)

Condition for fault identification
Test condition:
Monitor for voltage adaptation value electr. calibration of
CJ125 IC
Calibration runs after engine start and in idle phases
Terminal condition: Terminal 15 ON
Voltage condition:
battery voltage<11V oder Ubatt > 16 volts

Condition for fault memory entry
Fault criterion:
Calibration adaptation value > 0.1 volts
Fault entry after 10 sec.

Action in service
1. Check wiring harness
2. Replace control module

Fault effect and breakdown warning


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

Service instruction
none