C0570 code meaning
Brake Booster Travel Sensor Circuit High
What C0570 means
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.
C0570 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of C0570
- Electric brake assist switched off, pedal much harder
- Brake warning and stability control lamp on
- Driver assistance braking functions disabled
Common causes of C0570
- Most 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
- Less likelyWrong or not properly installed booster or sensor after a repair
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Brake booster travel sensorSensor wiring
What each part of C0570 means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 70 | The exact fault in that area. |
What to do next
- Note C0570 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about C0570
What does C0570 mean?
C0570 means "Brake Booster Travel Sensor Circuit High". C0570 is the high-side counterpart of C056F: the booster travel signal reads above its plausible maximum. It is a generic code, so it means the same on every make.
Is it safe to drive with C0570?
Drive gently and only to a workshop. With C0570 the car can go into limp mode (reduced power) to protect itself.
Will C0570 fail an emissions test?
C0570 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is C0570 to fix?
Difficulty: hard. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will C0570 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.