Chassis
generic / SAE
C0269
Brake Vacuum Sensor
The brake control module has detected an implausible signal from the vacuum sensor on the brake booster. Modern systems monitor booster vacuum to ensure brake assist is available, especially with stop-start engines and electric vacuum pumps.
SystemChassis
Typegeneric / SAE
GroupC0
Range / number2 / 69
Possible causes
- Vacuum sensor failed high
- Leak in vacuum supply line medium
- Vacuum pump weak low
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 100–800 €
- Estimated time: 0.5–3 h
- Component: brake vacuum sensor
- Component: brake booster
- Component: vacuum pump
Sources
References
sae:J2012