27C4

27C4 - P2227

Information saved in
DME

Fault code
27C4 - P2227

Fault text
Ambient pressure, plausibility

Fault description
Barometric Pressure Sensor 'A' Circuit Range/Performance

Condition for fault identification
Test condition:
|pumg_modell-pumg_roh| > 130 mbar
(K_PUMG_OBD_MODEL_DELTA_MAX)
Terminal condition: Engine running
Voltage condition:
none

Condition for fault memory entry
40000 ms

Action in service
1. Clear fault memory
2. Read analog data with SGBD and compare with current
barometric pressure - Important: pumg is not standardized to
sea level, but rather actual pressure, meaning it starts at
roughly 1000 hPa at sea level and there is then a pressure
drop of roughly 10 m

Fault effect and breakdown warning
pumg sensor value is within plausible range,
but shows substantial deviation from model value, or
displays an implausibly steep gradient

Driver information
Warning light:
MIL

Service instruction
none