P0407

4789 - P0407

Information saved in
DDE

Fault code
4789 - P0407

Fault text
DDE: Low-pressure exhaust-gas recirculation controller,
position sensor, signal: Open or short circuit to ground

Fault description
Low-pressure EGR travel feedback sensor monitoring. The
diagnostic trouble code is logged when the raw sensor signal
(voltage) is less than 100 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