Coolant thermostat, ME-SFI fault code description - AD07.61-P-4000-76L

		Coolant thermostat
1	Fault code ( Display on generic scan tool)	P202C (P0128)
2	Fault storage	After expiry of test duration and fault
	Actuation of the indicator lamp	No actuation
	Engine diagnosis (EURO3/4) CHECK ENGINE (MIL)	Following two successive drive cycles with faults
3	Checking frequency	Following a cold start
4	Checked signal or status	The increase in temperature after a cold start is compared to a stored temperature model
5	Fault setting conditions  Checking duration	Coolant temperature below +75 °C, although it must already be above +86 °C according to the temperature model. 10 to 30 min
6	Check prerequisites	No fault at coolant temperature sensor Coolant temperature at engine start lower than +65 °C Coolant temperature at engine start greater than -10 °C Intake air temperature greater than -10 °C During test period, maximum 35 % idle During test period, maximum 12 % overrun fuel shutoff