OBD-II code · Chassis

C0520 Brake Pedal Force Sensor Circuit

On systems with brake force sensing the dedicated sensor reports an implausible signal.

Is it safe to drive with C0520?

Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.

Common causes

  • Most likelySensor failed
  • PossibleWiring open

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
0.8–2.5 h
Emissions test
Usually unaffected
Parts involved
Brake Pedal Force Sensor, Sensor Wiring

Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.