P2626

2C4F - P2626

Information saved in
DME

Fault code
2C4F - P2626

Fault text
DME2: Oxygen sensor before catalytic converter, bank 2,
adjustment line

Fault description
Pre-catalyst oxygen sensor, trim circuit wire

Condition for fault identification
Test condition:
Monitoring on disconnected calibration wire (IA);
Diagnosis conditions:
- Trailing-throttle overrun abort present for at least 2 sec.
- Voltage at CJ125 > 4.8 V
- O2 sensor heated to adequate temperature
- Exhaust-gas temp. (model) before cat. < 750 °C
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 1 sec.

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

Fault effect and breakdown warning
Extreme mixture deviation stemming from shifted O2 sensor
response curve

Driver information
Warning light:
MIL on in 2nd DC

Service instruction
none