P204B

4D36 - P204B

Information saved in
DDE

Fault code
4D36 - P204B

Fault text
DDE: Reducing-agent pressure sensor, plausibility:

Fault description
Reduction agent pressure sensor plausibility check. The
plausibility of the pressure sensor's transmissions is assessed
using a pressure value calculated relative to the ambient
temperature. The diagnostic trouble code is logged when the
difference between measured reduction agent pressure and
the reference pressure exceeds the limit value 450 mbar.

Condition for fault identification
Test condition:
Execution of the error check is contingent upon compliance
with the following conditions:
1. The signal qualities of the reference pressure sensors are
OK.
2. The urea tank system has already been drained (level <=
0 %).
Voltage condition:
Execution of the error check is contingent upon compliance
with the following conditions:
1. The signal qualities of the reference pressure sensors are
OK.
2. The urea tank system has already been drained (level <=
0 %).

Condition for fault memory entry
Debounce (600 ms)

Action in service
1. Use diagnostic system to test the pressure sensor.
2. Replace delivery module.

Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
none