4D5C

4D5C - P242C

Information saved in
DDE

Fault code
4D5C - P242C

Fault text
Exhaust gas temperature sensor before SCR cat, plausibility:
upper physical limit exceeded

Fault description
When the physical sensor signal for exhaust-gas temperature
before the SCR converter rises above the limit value 750 �C
the diagnostic trouble code is logged.

Condition for fault identification
Test condition:
The monitoring function is only implemented when no
electrical error is logged.
Voltage condition:
The monitoring function is only implemented when no
electrical error 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 before the SCR
converter.

Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
none