P3023

27D4 - P3023

Information saved in
DME

Fault code
27D4 - P3023

Fault text
Oxygen sensor before cat., bank 2, evaluation module in
control module

Fault description
O2 Sensor Disturbed SPI Communication to WRAF-IC
(Bank 2 Sensor 1)

Condition for fault identification
Test condition:
No SPI communications
Terminal condition: Terminal 15
Voltage condition:
none

Condition for fault memory entry
2000 ms

Action in service
1. Check oxygen sensor plug and wiring harness
2. Replace oxygen sensor
3. Replace engine-management unit

Fault effect and breakdown warning


Driver information
Warning light:
MIL

Service instruction
none