4D01

4D01 - P244A

Information saved in
DDE

Fault code
4D01 - P244A

Fault text
DDE: Exhaust backpressure sensor: Signal too low

Fault description
Monitoring of particulate filter differential-pressure sensor.
A diagnostic trouble code is logged when the particulate
filter's differential pressure falls below the minimum limit
value -40 mbar.

Condition for fault identification
Test condition:
The check runs continuously in a 100 ms grid.
Voltage condition:
The check runs continuously in a 100 ms grid.

Condition for fault memory entry
Debounce (2000 ms)

Action in service
1. Check sensor, hose and electrical connections, conduct
backpressure test 2. If wires/plug connections are OK,
replace sensor.

Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
none