MSS60 Error: 2B57, P1605

Information saved in	DME
Fault code	2B59 - P0128
Fault text	Coolant thermostat monitoring
Fault description	Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
Condition for fault identification	Test condition: For the period K_TMOT_OBD_DIFF_T_DELTA the sensor deviates from the model by more than -25° Kelvin (K_TMOT_OBD_DIFF_HIGH)…
	Terminal condition: Engine running
	Voltage condition: None
Condition for fault memory entry	Once during warm-up phase
Action in service	1. Replace thermostat
	2. Perform electrical check on coolant sensor and replace as indicated
Fault effect and breakdown warning	Engine warms to normal operating temperature very slowly / ineffective interior heating / MIL on after engine runs 2x
Driver information	Warning light: MIL
Service instruction	None

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