481F - U029D (DDE)

481F - U029D

Information saved in
DDE

Fault code
481F - U029D

Fault text
DDE: Message (NOx sensor before SCR catalytic converter,
0x135, sensor-CAN): Message from NOx sensor before
SCR catalytic converter failed

Fault description
The diagnostic trouble code is logged when the NOx sensor
message is not received.

Condition for fault identification
Test condition:
The following conditions must be satisfied:
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted in cycles with a periodicity of 10
ms.
The error is checked in a 10 ms time grid.
Voltage condition:
The following conditions must be satisfied:
- The message must be active.
- Terminal 15 must be active.
The signals are transmitted in cycles with a periodicity of 10
ms.
The error is checked in a 10 ms time grid.

Condition for fault memory entry
Debounce (1000 ms)

Action in service
1. Check wires and plug connections.
2. If wiring and plug connections are OK:
3. Replace NOx control module 1 (before SCR converter).

Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
none