4C04 - P0425 (DDE)

4C04 - P0425

Information saved in
DDE

Fault code
4C04 - P0425

Fault text
Exhaust-gas temperature sensor before cat., plausibility:
Difference, measured from calculated exhaust-gas
temperature before cat., too high

Fault description
The error is logged when the difference between the
measured and the simulated exhaust-gas temperature
upstream from (on engine side of) the oxidation catalyst lies
outside the plausibility window.

Condition for fault identification
Test condition:
The error check is activated when no other faults are stored
for the sensor.
Voltage condition:
The error check is activated when no other faults are stored
for the sensor.

Condition for fault memory entry
Debounce (60000 ms)

Action in service
Replace exhaust-gas temperature sensor upstream from
oxidation catalyst.

Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
Defective exhaust-gas temperature sensor upstream from
oxidation catalyst.