2C53 - P2251 (DME)

2C53 - P2251

Information saved in
DME

Fault code
2C53 - P2251

Fault text
DME2: Oxygen sensor before catalytic converter, bank 2,
virtual ground

Fault description
Pre-catalyst oxygen sensor, virtual ground

Condition for fault identification
Test condition:
Monitoring for disconnected virtual ground wire (VM);
Diagnosis conditions:
- overrun fuel cutoff is not present
- oxygen sensor voltage is in 1.5V range for open wire
- no other errors related to the universal oxygen sensor have
been registered
- Error is
Terminal condition: Engine running
Voltage condition:
battery voltage<11V oder Ubatt > 16 volts

Condition for fault memory entry
Fault monitoring criterion must remain present over 5 sec.

Action in service
Check plug / wiring harness / O2 wiring, otherwise replace
O2 sensor

Fault effect and breakdown warning
none

Driver information
Warning light:
MIL on in 2nd DC

Service instruction
none