2F77 - P321E

2020 BMW 128i Coupe (E82) L6-3.0L (N51) Diagnostic Trouble Codes ( DTC ): Service instruction

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2F77 - P321E (DME)

2F77 - P321E

Information saved in

DME

Fault code

2F77 - P321E

Fault text

Ambient-pressure sensor, plausibility

Fault description

Ambient Pressure Sensor Maximum Pressure Implausible

Condition for fault identification

Test condition:

Ambient pressure sensor monitor Terminal condition: Terminal 15 ON Voltage condition:

Voltage in onboard electrical system > 10 V

Condition for fault memory entry

Because an excessively steep ambient pressure gradient must be detected, no precise statements regarding debounce time are possible.

Action in service

Plausibility check on barometric pressure (data range and sensor travel during mountain ascent and descent)

Replace DME only if barometric pressure data are implausible (internal component)

Fault effect and breakdown warning

Driver information

Warning light:

MIL ON in US versions only