P1209

27B7 - P1209

Information saved in
DME

Fault code
27B7 - P1209

Fault text
Electric vacuum pump for Mastervac

Fault description


Condition for fault identification
Test condition:
UP28 triggered
Terminal condition: Engine running,
ELUP activated
Voltage condition:
ub > K_DIAG_TR_Plus_Min

Condition for fault memory entry
mvac_p fails to drop

Action in service
1. Check UP28 electrical connections
2. Check fuse
3. Check UP28 vacuum hose + non-return valve
4. Replace UP28

Fault effect and breakdown warning
Reduced power \ engine speed limited to 2000 rpm \ display
in instrument cluster \ MIL comes on after engine runs 2x

Driver information
Warning light:
No

Service instruction
none