Manufacturer Code Charts: 4784

4784 - P0408

Information saved in
DDE

Fault code
4784 - P0408

Fault text
DDE: Low-pressure exhaust-gas recirculation controller,
position sensor, signal: Short circuit to positive

Fault description
Low-pressure EGR travel feedback sensor monitoring. The
diagnostic trouble code is logged when the raw sensor signal
(voltage) is greater than 4900 mV.

Condition for fault identification
Test condition:
No faults related to the sensor's voltage supply should be
logged.
Voltage condition:
No faults related to the sensor's voltage supply should be
logged.

Condition for fault memory entry
Debounce (220 ms)

Action in service
1. Check wires and plug connections.
2. If wiring and plug connections are OK:
Replace low-pressure EGR actuator.

Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
none