Fault code description - ME-SFI - coolant temperature sensor - AD07.61-P-4000-04A

1	Fault code	P0115
2	Fault storage	after the end of the test period and faults
	Activation of malfunction indicator lamp for engine diagnosis (EURO3/4) or CHECK ENGINE (MIL)	after two successive driving cycles with faults
3	Frequency of the test	continuous
4	Checked signal or status	Limits for coolant temperature/plausibility
5	Fault setting conditions	Fault, if the resistance is greater than approx. 80 kΩ (approx. -39 °C)
	Lower limit	Fault, if the resistance is less than approx. 45 Ω (approx. +170 °C)
	Upper limit	The increase in temperature after a cold start is compared to a stored temperature model
	Plausibility	(characteristic). Depending on the start temperature and the engine speed, at least +15 °C must be reached after approx. 120 -1200 s.
6		In the event of a fault, driving continues at a substitute value from the temperature model. If the signal becomes plausible again, the system changes over to the signal from the coolant temperature sensor.