C0025Brake Pedal Feedback Pressure Sensor Circuit
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- C0025 covers the pressure sensor on the pedal feedback side of a decoupled or brake-by-wire system, the measuring partner of the feedback valve C0024. In such systems the pedal pushes fluid into a pedal feel simulator via a simulator valve the module can open or close, while separate sensors read pressure in the simulator circuit and in the wheel circuit. A patent for this layout reads the driver's request from a pressure sensor on the master cylinder side and describes a standstill self-test that opens the simulator valve and watches the pressure rise. The module sets C0025 for a signal out of range, an open or short, or a value that does not fit pedal travel. Pedal feel changes, assist may drop to a mechanical fallback, and the brake or ABS lamp lights. No manufacturer documents this code publicly.
- What you may notice
- Changed or abnormal pedal feel
- Loss of brake assist, driver messages
- ABS or brake warning lamp on
- Likely causes
- LikelyFeedback pressure sensor out of range
- PossibleHarness or connector fault
- RareInternal brake actuation unit fault
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €300 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.