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 °C
Start temperature (coolant temperature)<65 °C
und >-10 °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