4BAB - P203A (DDE)

4BAB - P203A

Information saved in
DDE

Fault code
4BAB - P203A

Fault text
DDE: Reducing-agent active-tank fill-level sensor, signal:
Sensor monitoring fault

Fault description
Plausibility check on active tank reduction agent level.
The level sensor's processing circuit transmits the
information "all sensors wet" immediately followed by "all
sensors dry" within the period 70 s. The diagnostic trouble
code is logged when the status change is not completed
within this period.
The diagnostic trouble code is also logged when the raw
level value does not lie between SCR_rUTnkLvlMin_C and
SCR_rUTnkLvlMax_C.

Condition for fault identification
none

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:
3. Use the diagnostic system to check the fluid sensor.
4. Replace the electronic processing circuitry for the active
tank's fluid-level sensors.

Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
none