Engine Controls System: 2741

2741 - P3027

Information saved in
DME

Fault code
2741 - P3027

Fault text
Oxygen sensor heating control diagnosis before catalytic
converter, bank 2

Fault description
O2 Sensor Temperature Measurement Operating
Temperature not Reached (Bank 2 Sensor 1)

Condition for fault identification
Test condition:
Heater controller hangs up for a certain period 10s
(K_LSRVK_OBD_REG_T) at limit
Terminal condition: Engine running - Condition idle or part-
load
Voltage condition:
Battery voltage > 9V (k_ed_ubmin)

Condition for fault memory entry
10000 ms

Action in service
1. Check plug and wiring harness on pre-cat oxygen sensor
LSVK B2,
2. If OK, replace oxygen sensor

Fault effect and breakdown warning
MIL lamp on after engine runs 2x /Small influence on
drivability

Driver information
Warning light:
MIL

Service instruction
none