Chassis
generic / SAE
C0556
Brake Booster Pressure Sensor Performance
The brake booster vacuum or pressure sensor signal does not respond plausibly to engine vacuum or electric booster activity.
SystemChassis
Typegeneric / SAE
GroupC0
Range / number5 / 56
Possible causes
- Vacuum leak in booster line high
- Vacuum pump weak medium
- Sensor element aged beyond calibration window low
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: 60–600 €
- Estimated time: 0.5–3 h
- Component: brake booster vacuum sensor
- Component: vacuum pump
Sources
References
sae:J2012