4D03

4D03 - P14A3

Information saved in
DDE

Fault code
4D03 - P14A3

Fault text
DDE: Exhaust backpressure sensor: Sensor drift outside
tolerance

Fault description
Exhaust backpressure offset monitor.
If the differential between ambient barometric pressure and
the pressure before the particulate filter exceeds
32767 mbar, or the absolute value of the adapted raw
pressure value is greater than 30 mbar the DTC is entered.

Condition for fault identification
Test condition:
The error check is performed when:
- Following engine stationary, with ECU in shutdown phase
and following completion of waiting time 4 s for the period
10 s.
Voltage condition:
The error check is performed when:
- Following engine stationary, with ECU in shutdown phase
and following completion of waiting time 4 s for the period
10 s.

Condition for fault memory entry
Debounce (2000 ms)

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

Fault effect and breakdown warning
-

Driver information
Warning light:
MIL

Service instruction
none