2F12 - P0646

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

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2F12 - P0646 (DME)

2F12 - P0646

Information saved in

DME

Fault code

2F12 - P0646

Fault text

Air-conditioning compressor, activation

Fault description

A/C Clutch Relay Control Circuit Low

Condition for fault identification

Test condition:

Air conditioner relay control-activation monitor; air conditioning initialized

Briefly triggered by relay

Air conditioning installed and switched on

Terminal condition: Terminal 15 ON Voltage condition:

Voltage in onboard electrical system > 10 V

Condition for fault memory entry

1 sec.

Action in service

1. Check wiring Repair if defective

If wiring is OK proceed

to check component, a/c compressor relay

Fault effect and breakdown warning