MSS60 Error: 27E4, P1209

Information saved in	DME
Fault code	27E4 - P1209
Fault text	Vacuum sensor, brake booster, plausibility
Fault description	Brake Booster Pump Shutoff Valve Plausibility
Condition for fault identification	Test condition: Constant violations of activation threshold or vacuum gradient is too low during activation
	Terminal condition: TERM87
	Voltage condition: none
Condition for fault memory entry	5000 ms
Action in service	1. Check ELUP fuse,
	2. Check wires,
	3. Replace ELUP
Fault effect and breakdown warning	CC message
	Engine speed limited
	Reduced power
	MIL after engine runs 2x
Driver information	Warning light: MIL, EML, CC message, backup program
Service instruction	None

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