P120D

4B72 - P120D

Information saved in
DDE

Fault code
4B72 - P120D

Fault text
DDE: Heating crankcase ventilation, activation: Output
stage, overtemperature

Fault description
The DDE recognizes an over-temperature fault in the output
stage:
Positive crankcase ventilation heater.

Condition for fault identification
none

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