OBD-II code · Chassis
C0273 Brake Booster Pressure Sensor Circuit Malfunction
The brake control module has detected an out-of-range or implausible signal from the brake booster pressure sensor. Brake assist and electronic boost functions may be limited.
Is it safe to drive with C0273?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyBooster pressure sensor failed
- PossibleWiring or connector fault to sensor
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
- 0.5–2.5 h
- Emissions test
- Usually unaffected
- Parts involved
- Brake Booster, Booster Pressure Sensor, Brake Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.