P20A3

46BF - P20A3

Information saved in
DDE

Fault code
46BF - P20A3

Fault text
DDE: Reducing-agent changeover valve, activation: Short
circuit to positive

Fault description
The DDE recognizes a short circuit to the high side in the
output stage:
Reduction agent switch valve (urea delivery from passive to
active urea tank)

Condition for fault identification
Test condition:
The error check proceeds continuously according to the
programmed process grid.
Voltage condition:
The error check proceeds continuously according to the
programmed process 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 delivery module.

Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
none