C0570Brake Booster Travel Sensor Circuit High
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- C0570 is the high-side counterpart of C056F: the booster travel signal reads above its plausible maximum. Typical triggers are a signal wire touching the 5 V reference line or battery positive, or a broken sensor ground that lets the input float upward. Travel sensing in boosters dates back to vacuum units in which an electrical sensor in the housing reported the position of the movable wall and had to be set against housing tolerances; electromechanical units like the iBooster measure pedal travel with a sensor inside the unit instead. No manufacturer documents C0570 publicly. A value stuck at the top can look like a fully pressed pedal, so the module normally disables electric assist and brake assist; stopping then needs much more pedal effort.
- What you may notice
- Electric brake assist switched off, pedal much harder
- Brake warning and stability control lamp on
- Driver assistance braking functions disabled
- Likely causes
- LikelySignal wire shorted to the 5 V reference or to battery voltage
- PossibleOpen sensor ground letting the signal float to the upper limit
- PossibleTravel sensor damaged internally, e.g. after water ingress at the booster
- RareWrong or not properly installed booster or sensor after a repair
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.