4B7E - P0473 (DDE)

4B7E - P0473

Information saved in
DDE

Fault code
4B7E - P0473

Fault text
DDE: Exhaust-gas pressure sensor before turbocharger,
signal: Short circuit to positive

Fault description
The diagnostic trouble code is logged when the raw voltage
signal from the pre-turbocharger exhaust-gas pressure sensor
exceeds the limit value 2800 mV.

Condition for fault identification
Test condition:
The monitoring function is only implemented when no
sensor power-supply problem is logged. The error check
proceeds continuously according to the programmed process
grid.
Voltage condition:
The monitoring function is only implemented when no
sensor power-supply problem is logged. The error check
proceeds continuously according to the programmed process
grid.

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 pressure sensor before turbocharger.

Fault effect and breakdown warning
Proceed to the nearest BMW Service facility.
Component hazard possible.

Driver information
Warning light:
MIL

Service instruction
none