C063F code meaning
Brake Pressure Sensor J Circuit Low
What C063F means
The signal of brake pressure sensor J is stuck below its lower limit. Ipgate's double-stroke-piston patent fits one pressure sensor to each brake circuit and checks the delivered fluid volume against the pressure-volume curve of that circuit; such a circuit sensor is one possible J position, though no manufacturer confirms the letter. Denso defines 0–0.3 V as the low fault band and notes that a broken feed or signal line also lands there when the input has a pull-down. Saab/GM detects a ground short or open on the signal or 5 V reference after 0.1 s and then turns off ABS, traction and stability control for the rest of the ignition cycle. Usual suspects: a chafed signal wire, a shorted reference, a failed sensor element.
C063F 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 C063F
- ABS, traction and stability warning lamps on
- ABS and ESC inoperative until the next ignition cycle
Common causes of C063F
- Most likelyChafed signal wire touching ground
- Possible5 V reference shorted to ground
- PossibleBroken feed or signal wire pulled to 0 V by the module input
- Less likelyFailed sensing element in sensor J
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Brake pressure sensor jSensor wiring
What each part of C063F means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 3F | The exact fault in that area. |
What to do next
- Note C063F 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 C063F
What does C063F mean?
C063F means "Brake Pressure Sensor J Circuit Low". The signal of brake pressure sensor J is stuck below its lower limit. It is a generic code, so it means the same on every make.
Is it safe to drive with C063F?
Drive gently and only to a workshop. With C063F the car can go into limp mode (reduced power) to protect itself.
Will C063F fail an emissions test?
C063F 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 C063F to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will C063F clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.