4704 - P204D (DDE)

4704 - P204D

Information saved in
DDE

Fault code
4704 - P204D

Fault text
DDE: Reducing-agent pressure sensor, signal: Short circuit
to positive

Fault description
The diagnostic trouble code is logged when the raw voltage
signal from the reduction agent pressure sensor rises above
the limit value 4900 mV.

Condition for fault identification
Test condition:
The test routine is executed only provided that no other
electrical faults are present.
Voltage condition:
The test routine is executed only provided that no other
electrical faults are present.

Condition for fault memory entry
Debounce (400 ms)

Action in service
1. Check wires and plug connections.
The power-supply voltage is up to 4.9V.
2. If wiring and plug connections are OK:
3. Check pressure sensor.
4. Replace delivery module.

Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
For access reasons, start by checking wires between transfer
plug and DDE (E70: behind the front bumper, E90: behind
left rear wheel).