4D90

4D90 - P040C

Information saved in
DDE

Fault code
4D90 - P040C

Fault text
Exhaust gas temperature sensor after exhaust gas
recirculation cooler, range: upper physical limit exceeded

Fault description
The diagnostic trouble code is logged when the sensor signal
for exhaust-gas temperature behind the EGR cooler rises
above the limit value 500 �C.

Condition for fault identification
Test condition:
The monitoring function is only implemented when no
sensor power-supply problem is logged.
Voltage condition:
The monitoring function is only implemented when no
sensor power-supply problem is logged.

Condition for fault memory entry
Debounce (2000 ms)

Action in service
1. Check wires and plug connections.
2. If wiring and plug connections are OK:
Replace exhaust-gas temperature sensor behind EGR cooler.

Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
none