P045B

4DA7 - P045B

Information saved in
DDE

Fault code
4DA7 - P045B

Fault text
DDE: Low-pressure exhaust-gas recirculation controller,
activation: Output stage, overtemperature

Fault description
The DDE recognizes an over-temperature fault in the output
stage:
Low-pressure EGR actuator.

Condition for fault identification
Test condition:
The error check proceeds continuously in the programmed
process grid.
Voltage condition:
The error check proceeds continuously in the programmed
process grid.

Condition for fault memory entry
Debounce (220 ms)

Action in service
Check E-Box fan/DDE cooling. If E-Box fan/DDE cooling
are OK:
Replace DDE ECU.

Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
none