4BF4 - P244B (DDE)

4BF4 - P244B

Information saved in
DDE

Fault code
4BF4 - P244B

Fault text
4BF4Exhaust gas differential pressure sensor, diesel particle
filter, signal: Short circuit to positive

Fault description
Exhaust-gas differential-pressure sensor monitoring. The
diagnostic trouble code is logged when the raw sensor signal
(voltage) exceeds the specified upper limit 4750 mV.

Condition for fault identification
Test condition:
The test routine is executed only provided that no other
electrical faults are present. The test frequency varies
according to the process sequence control.
Voltage condition:
The test routine is executed only provided that no other
electrical faults are present. The test frequency varies
according to the process sequence control.

Condition for fault memory entry
Debounce (600 ms)

Action in service
1. Check wires and plug connections.
2. If wiring and plug connections are OK:
Replace exhaust-gas differential-pressure sensor.

Fault effect and breakdown warning
The error disables regeneration in the particulate filter.

Driver information
Warning light:
MIL

Service instruction
none