2019 BMW 128i Convertible (E88) L6-3.0L (N51) A L L Diagnostic Trouble Codes ( DTC ): Manufacturer Code Charts Page 235
Driver information
Warning light:
no external display;
Service instruction
none
2EF4
2EF4 - P0128
Information saved in
DME
Fault code
2EF4 - P0128
Fault text
Map thermostat, mechanism
Fault description
Coolant Thermostat (Coolant Temperature Below
Thermostat Regulating Temperature)
Condition for fault identification
Test condition:
Outside temperature >-10 锟斤拷C
Start temperature (coolant temperature)<65 锟斤拷C
und >-10 锟斤拷C
Speed > 30 and<130km/h
Terminal condition: Terminal 15, engine on
Voltage condition:
Voltage in onboard electrical system > 10 V
Condition for fault memory entry
Once release point is reached 25 sec.
Action in service
1. Check heating of engine
2. Check thermostat and replace as indicated
Fault effect and breakdown warning
Driver information
Warning light:
MIL on in 2nd driving cycle
Service instruction
none
2EF5 - P0597 (DME)
2EF5 - P0597
Information saved in
DME
Fault code
2EF5 - P0597
Fault text
Map thermostat, activation
Fault description
Thermostat Heater Control Circuit/Open
Condition for fault identification
Test condition:
Control-activation with
