OBD-II code · Chassis
C0258 Brake Booster Vacuum Sensor Circuit
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 with C0258?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyVacuum hose leak
- PossibleSensor failed
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Brake Booster Vacuum Sensor, Vacuum Hose
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.