C063CBrake Pressure Sensor H Range/Performance
- Generic OBD-II code · Chassis
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- 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.
- What you may notice
- ESC malfunction telltale and ABS lamp on
- Changed pedal feel or reduced brake assistance
- Likely causes
- LikelyOffset or gain of sensor H drifted out of tolerance
- PossibleRestricted passage or faulty brake cylinder so pressures really differ
- RareAir in the brake fluid distorting the pressure build-up
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €1,800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.