2019 BMW 128i Convertible (E88) L6-3.0L (N51) A L L Diagnostic Trouble Codes ( DTC ): Manufacturer Code Charts Page 312
Fault description
Ambient Air Temperature Sensor Range/Performance
Condition for fault identification
Test condition:
PLAUS
Terminal condition: no invariable debounce time, constant
sensor data reading during engine warm-up produces entry
Voltage condition:
Terminal 15 ON
Condition for fault memory entry
Plausibility monitoring of ambient temperature sensor with
end of start phase recognized
Action in service
Constant, invariable sensor signal:
Sticking sensor, sensor manipulation
Fault effect and breakdown warning
Driver information
Warning light:
1) Visual inspection of sensor
2) Electrical check on sensor wire and power supply wire
2) Check sensor data response to motion
3) Replace sensor
Service instruction
none
Condition For Fault Memory Entry - at Least 2 Bits Are Set to 2
29CC - P0300
Information saved in
DME
Fault code
29CC - P0300
Fault text
Combustion misfires, several cylinders
Fault description
Random/Multiple Cylinder Misfire Detected
Condition for fault identification
Test condition:
Combustion consistency measurement. Starting at engine
speed n > 450 and n < 7000. Ambient pressure > 740 hPa
Combustion miss on at least two cylinders
Terminal condition: Terminal 15, engine on
Voltage condition:
Voltage in onboard electrical system > 10 V
Condition for fault memory entry
at least 2 bits from Sym0 are set to 2
Action in service
Ignition coils, spark plugs, ignition cables, injectors, DME
Fault effect and breakdown warning
