C056C code meaning
Brake Pressure Sensor B Intermittent/Erratic
What C056C means
C056C is the intermittent fault of the second brake pressure sensor, B. Which pressure B measures depends on the system – in Ford's hybrid ABS modules the two sensors read different points of the hydraulic unit, and other makers fit sensor B in a separate circuit or in the boost chamber. No maker documents C056C publicly. By analogy with sensor A (Ford C056B: corrupted sensor data or a missing control response for 70 ms), the code points to brief signal loss rather than lasting drift, which belongs under C0541. Honda's patent shows how a pressure sensor is judged: if pedal stroke rises but pressure does not follow, the sensor is deemed faulty. Typically stability functions shut down until the next start.
C056C at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of C056C
- Sporadic ABS or stability warning
- Traction and stability control briefly unavailable
- No noticeable change in normal braking
Common causes of C056C
- Most likelyIntermittent contact at the sensor B connector or harness
- PossibleSensor B electronics dropping out under heat or vibration
- PossiblePoor ground or unstable reference voltage
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Brake pressure sensor b
What each part of C056C means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 6C | The exact fault in that area. |
What to do next
- Note C056C 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 C056C
What does C056C mean?
C056C means "Brake Pressure Sensor B Intermittent/Erratic". C056C is the intermittent fault of the second brake pressure sensor, B. It is a generic code, so it means the same on every make.
Is it safe to drive with C056C?
Drive gently and only to a workshop. With C056C the car can go into limp mode (reduced power) to protect itself.
Will C056C fail an emissions test?
C056C 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 C056C to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will C056C clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.