2010 BMW 128i Convertible (E88) L6-3.0L (N52K) P Code Charts
none
P0121
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
1) Check: The sum of throttle valve voltages must equal 5
V,
2) Perform electrical check on wiring from DME to throttle
valve,
3) Visual inspection of plug-in contacts (at component,
70
wiring harness and DME),
4) 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
