P3023

2C4B - P3023

Information saved in
DME

Fault code
2C4B - P3023

Fault text
DME2: Control unit, internal fault, bank 2: oxygen-sensor
module

Fault description
Control module, internal fault: Oxygen sensor module

Condition for fault identification
Test condition:
Communications fault between ECU and CJ125 chip (SPI
bus)
Terminal condition: Terminal 15 ON
Voltage condition:
battery voltage<11V oder Ubatt > 16 volts

Condition for fault memory entry
Fault monitoring criterion must remain present over 2 sec.

Action in service
Replace DME

Fault effect and breakdown warning
none

Driver information
Warning light:
MIL on in 2nd DC

Service instruction
none