2CA0 - P3027 (DME)

2CA0 - P3027

Information saved in
DME

Fault code
2CA0 - P3027

Fault text
DME2: Oxygen-sensor heating before catalytic converter,
bank 2

Fault description
Pre-catalyst oxygen sensor heater

Condition for fault identification
Test condition:
Recognition of reduced heater performance at the pre-
catalyst oxygen sensor (no defects in heater wiring) is based
on monitoring of the oxygen sensor's cermaic temperature
and the pulse-duty factor
Diagnosis conditions:
- No overrun cutoff
- Exhaust-gas temperature > 400 °C
- No others
Terminal condition: Engine running
Voltage condition:
battery voltage<11V oder Ubatt > 16 volts

Condition for fault memory entry
40 sec.

Action in service
Check plug, replace sensor

Fault effect and breakdown warning
none

Driver information
Warning light:
MIL on in 2nd DC

Service instruction
none