2019 BMW 128i Convertible (E88) L6-3.0L (N51) A L L Diagnostic Trouble Codes ( DTC ): Manufacturer Code Charts Page 209
diagnosis
Terminal condition: Terminal 15 ON
Voltage condition:
Voltage in onboard electrical system >= 10 V
Condition for fault memory entry
480 ms
Action in service
Check throttle-valve potentiometer
At frequency > 3 Replace DME
Fault effect and breakdown warning
Driver information
Warning light:
MIL OFF EML ON CC: Reduced power, engine
malfunction
RPM limited to 1300 rpm
Service instruction
none
2D52
2D52 - P16A9
Information saved in
DME
Fault code
2D52 - P16A9
Fault text
DME, internal fault: monitoring, engine speed
Fault description
Control Module Self-Test, Speed Monitoring Reset
Condition for fault identification
Test condition:
Control module monitor
Modelled rpm from segment time is compared with
crankshaft rpm
Terminal condition: Terminal 15 ON
Voltage condition:
Voltage in onboard electrical system >= 10 V
Condition for fault memory entry
480 ms
Action in service
If frequency >=3 Replace DME
Fault effect and breakdown warning
Driver information
Warning light:
MIL OFF EML ON CC: Reduced power, engine
malfunction
RPM limited to 1300 rpm
