OBD-II code · Chassis
C0240 Brake Pressure Sensor
The ABS or stability control module has detected a fault in a brake pressure sensor. Pressure information is used by ESP and brake assist to determine driver intent and modulation pressure during regulation.
Is it safe to drive with C0240?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyBrake pressure sensor failed
- PossibleWiring or connector fault
- Less likelyAir in brake system
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 Pressure Sensor, ABS Hydraulic Unit, ABS Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.