C063C code meaning
Brake Pressure Sensor H Range/Performance
What C063C means
Sensor H gives an electrically valid yet implausible pressure. In Toyota's eight-sensor patent the check connects a pressure source to a brake cylinder: both readings should then nearly match, and a gap beyond a threshold means one of the two sensors, the passage or the cylinder is at fault; the switch-over is preferably made at standstill. Ford's hybrid brake, which has only two pressure sensors, shows typical limits: a P1 offset outside ±16 bar, or both sensors more than 50 bar apart for 100 ms. That Ford needs no letters beyond A and B also shows that H exists only in larger systems. No maker documents C063C. FMVSS 126 requires a telltale for ESC malfunctions, so the driver gets a warning lamp that goes out only after the fault has gone.
C063C at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 4 hours
- Clears after repairAfter a drive cycle
Symptoms of C063C
- ESC malfunction telltale and ABS lamp on
- Changed pedal feel or reduced brake assistance
Common causes of C063C
- Most likelyOffset or gain of sensor H drifted out of tolerance
- PossibleRestricted passage or faulty brake cylinder so pressures really differ
- Less likelyAir in the brake fluid distorting the pressure build-up
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Brake pressure sensor h
What each part of C063C means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 3C | The exact fault in that area. |
What to do next
- Note C063C 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 C063C
What does C063C mean?
C063C means "Brake Pressure Sensor H Range/Performance". Sensor H gives an electrically valid yet implausible pressure. It is a generic code, so it means the same on every make.
Is it safe to drive with C063C?
Drive gently and only to a workshop. With C063C the car can go into limp mode (reduced power) to protect itself.
Will C063C fail an emissions test?
C063C 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 C063C to fix?
Difficulty: hard. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will C063C clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.