2CF6 - P0121

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

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2CF6

2CF6 - P0121

Information saved in

DME

Fault code

2CF6 - P0121

Fault text

Throttle-valve potentiometer 1, plausibility to air mass

Fault description

Throttle/Pedal Position Sensor/Switch 'A' Circuit Range/Performance

Condition for fault identification

Test condition:

Plausibility check on throttle valve aperture angle as measured aginst modelled data

Terminal condition: Terminal 15 on, engine on Voltage condition:

Voltage in onboard electrical system >= 10 V

Condition for fault memory entry

0.25 sec.

Action in service

Check: The sum of throttle valve voltages must equal 5 V,

Perform electrical check on wiring from DME to throttle valve,

Visual inspection of plug-in contacts (at component, wiring harness and DME),

Replace component

Fault effect and breakdown warning

Driver information

Warning light:

CC status report: WAL_1, reduced engine output!, MIL ON

possible EMB + rpm limit at 1300 rpm