2A74

2A74 - P2270

Information saved in
DME

Fault code
2A74 - P2270

Fault text
Oxygen sensor after catalytic converter, ageing

Fault description
Post-catalyst oxygen sensor, ageing

Condition for fault identification
Test condition:
Engine turns over, activity diagnosis (lambda setpoint shift)
completed
Terminal condition: Terminal 15
Voltage condition:
Onboard electrical system voltage ubsq > 11 V

Condition for fault memory entry
0.2 sec.

Action in service
Replace oxygen sensor behind catalytic converter

Fault effect and breakdown warning
None
MIL lights up when fault is detected in two consecutive
driving cycles

Driver information
Warning light:
MIL ON

Service instruction
None