Code result
C0258
Brake Booster Vacuum Sensor Circuit
Moderate severity
What it means
The brake booster vacuum sensor reports an implausible signal; brake assist functions are reduced. Boost control tracks commanded vs. actual manifold pressure; persistent deviation means wastegate, vanes, hose or actuator are not delivering the requested pressure.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Vacuum hose leak
highOne of the most commonly reported causes for this code — check this first.
Sensor failed
mediumA plausible cause — test and verify before replacing parts.
Related help
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