2019 BMW 128i Convertible (E88) L6-3.0L (N51) A L L Diagnostic Trouble Codes ( DTC ): Manufacturer Code Charts Page 121
at time of adaptation request
Terminal condition: Terminal 15 ON
Voltage condition:
Voltage in onboard electrical system >= 10 V
Condition for fault memory entry
none
Action in service
1) Check adaptation conditions, following confirmation
proceed to terminal switch
Fault effect and breakdown warning
Driver information
Warning light:
CC status report: Reduction in engine performance!,
MIL ON
Throttle valve emergency default mode + speed governed to
1300 rpm
Service instruction
none
2CFB - P1633 (DME)
2CFB - P1633
Information saved in
DME
Fault code
2CFB - P1633
Fault text
Throttle-valve adaptation value
Fault description
Throttle Valve Adaptation Limp-Home Position Unknown
(Bank 1)
Condition for fault identification
Test condition:
Terminal change and request for adaptation
Terminal condition: Terminal 15 ON
Voltage condition:
Voltage in onboard electrical system >= 10 V
Condition for fault memory entry
none
Action in service
1) Check: Sum of throttle valve voltages must equal 5 V,
2) Perform electrical check on wires to throttle valve
sensors,
Visual inspection of plug-in terminals (on components,
wiring harness and DME),
3) Component defect improbable, replace throttle valve only
in emergency
Fault effect and breakdown warning
Driver information
Warning light:
CC status report: Reduced engine performance!,
MIL ON
EMB + rpm limit 1300 rpm
