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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