LEMON Manuals
: Even more car manuals for everyone: 1960-2025
Home
>>
Jaguar
>>
2011
>>
XF Base
>>
Repair and Diagnosis (Single Page)
>>
Brakes
>>
Traction Control
>>
Diagnostic Trouble Code: Anti-Lock Braking System (Abs) -- XF/X250
>>
Diagnostic Trouble Code (DTC) Index DTC: Anti-Lock Brake System Central Module (ABS)
>>
Description And Operation
>>
DTC C0021-09: Brake Booster Performance - Component failures
>>
Action
April 5, 2026:
LEMON Manuals is launched!
Read the announcement.
DTC C0021-09: Brake Booster Performance - Component failures: Action
Install a new brake booster vacuum hose as necessary
Install a new brake vacuum pump as necessary
Install a new brake booster as necessary