2010 BMW 128i Convertible (E88) L6-3.0L (N52K) P Code Charts
none
P0128
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
Fault effect and breakdown warning
Driver information
Warning light:
MIL on in 2nd driving cycle
