2010 BMW 128i Convertible (E88) L6-3.0L (N52K) Manufacturer Code Page 233
Fault text
Electric fan, self-diagnosis
Fault description
Fan Mechanical or Hardware Defect
Condition for fault identification
Test condition:
PWM > 10%
Terminal condition: Terminal 15 ON
Voltage condition:
Voltage in onboard electrical system > 10 V
Condition for fault memory entry
200 sec.
Action in service
1. Disconnect plug from fan assembly. (otherwise there is an
injury hazard)
2. The fan moves freely
Check and remove any foreign objects.
–> Fan is mechanically seized: Replace fan –> Fan blades
turn freely: Reconnect plug and use tester to activate fan at
least 15 %.
–> Fan should start.
–> Fan fails to start running: Replace fan assembly
Fault effect and breakdown warning
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 掳C
Start temperature (coolant temperature)-10 掳C
Speed > 30 and 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
