Powertrain
generic / SAE
P050F
Brake Assist Vacuum Too Low
The ECU monitors the vacuum supplied to the brake booster (either via a dedicated sensor or via intake manifold pressure). The level has dropped below the calibrated threshold; brake-pedal feel will be hard, and an electric vacuum pump may be commanded to restore vacuum.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number5 / 0F
Possible causes
- Vacuum leak in booster line or check valve high
- Electric vacuum pump weak medium
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 120–700 €
- Estimated time: 0.8–3 h
- Component: brake booster
- Component: vacuum pump
- Component: vacuum check valve
- MIL / check engine light
Sources
References
sae:J2012