OBD-II code · Chassis
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.
Is it safe to drive with C0269?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyVacuum sensor failed
- PossibleLeak in vacuum supply line
- Less likelyVacuum pump weak
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
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Brake Vacuum Sensor, Brake Booster, Vacuum Pump
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.