Chassis
generic / SAE
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.
SystemChassis
Typegeneric / SAE
GroupC0
Range / number2 / 58
Possible causes
- Vacuum hose leak high
- Sensor failed medium
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 60–400 €
- Estimated time: 0.5–2 h
- Component: brake booster vacuum sensor
- Component: vacuum hose
Sources
References
sae:J2012