Vacuum Reservoir
A sealed tank that stores vacuum so the devices depending on it keep working when the engine cannot supply any — at wide open throttle, or on a turbocharged engine whose manifold is above atmospheric pressure much of the time. Everything from the brake servo to EGR and wastegate actuators may draw on it. It has no moving parts, so faults are almost always the check valve that holds the vacuum in or a perished hose that lets it out, both of which are inexpensive and both of which present as something far more alarming.
Also known as: vacuum tank, vacuum canister, vacuum accumulator, vacuum ball, vacuum store
Referenced by 5 codes
Codes involving this component (5)
Other components in Engine Mechanical
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