OBD-II code · Chassis
C0131 Master Cylinder Pressure Sensor Range/Performance
The ABS or stability control module has detected an implausible signal from the master cylinder brake pressure sensor. This sensor reports driver brake input and is used by ABS and ESP for control decisions.
Is it safe to drive with C0131?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyPressure sensor failed
- PossibleWiring or connector fault
- Less likelyAir in brake system causing erratic pressure
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
- Master Cylinder Pressure Sensor, ABS Control Module, Esp Control Module
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.