P120F

27B7 - P120F

Information saved in
DME

Fault code
27B7 - P120F

Fault text
Vacuum pump, brake booster, activation

Fault description
Brake Booster Pump Circuit Low

Condition for fault identification
Test condition:
ATIC39 diagnosis message
Terminal condition: TERM87
Voltage condition:
Battery voltage > 9.8V (k_diag_tr_ub_min)

Condition for fault memory entry
1000 ms

Action in service
1. Check electrical connection to relay
2. Replace relay

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