C0258

Brake Booster Vacuum Sensor Circuit

Moderate severity

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.

Common causes

Vacuum hose leak
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $70-440
Sensor failed
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $70-440
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First things to check

1Confirm the code with a scan tool and check for additional related codes.
2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.

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Related codes

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Frequently asked questions

What does C0258 mean?

C0258 means "Brake Booster Vacuum Sensor Circuit". It is a generic OBD-II code that points to a fault in the chassis.

What are the most common causes of C0258?

vacuum hose leak; sensor failed — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.

Can I keep driving with this code?

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.

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