(DME) Condition For Fault Memory Entry - 1
2C6E - P1131Information saved in
DME
Fault code
2C6E - P1131
Fault text
Oxygen sensor behind catalytic converter 2, ageing
Fault description
O2 Sensor Circuit Dynamic Test (Bank 2 Sensor 2)
Condition for fault identification
Test condition:
O2 sensor aging test
No secondary air injection,
0 < Speed < 150 km/h
Terminal condition: Terminal 15, engine on
Voltage condition:
none
Condition for fault memory entry
Switching time counter > 1.5 (sensor transition from rich to
lean too slow)
Action in service
0. Was the temperature drop caused by external factors
(driving into snow pile, ice on O2 sensor?) Thaw sensor,
clear all fault memory, continue driving!
1. Check O2 sensor heater: Contact resistance on plugs and
in wiring is excessive (DME - wiring harness - sensor)
2. Check wiring
3. Check O2 sensor plug (water or corrosion in the plug?
Repeatedly disconnect the plug and then re-insert it
FIRMLY)
4. Replace plug and/or wire as indicated
5. Replace the affected downstream (post-cat) O2 sensor
Fault effect and breakdown warning
Driver information
Warning light:
MIL ON
Service instruction
none