C059D code meaning
Brake Pressure Sensor D Missing Calibration
What C059D means
C059D flags missing calibration data for a fourth hydraulic pressure sensor. No manufacturer publishes this code. Where the letter D appears elsewhere, GM's 2016 hybrid brake controller uses it for the rear-left wheel pressure sensor (C0575–C0578), yet reports that sensor's calibration fault as C059B; the letters of the calibration codes therefore follow each maker's own list. Mitsubishi's 2023 Outlander PHEV has a comparable fault without SAE number, C105E-92 for an uncalibrated pressure sensor, detected within 1 s, and tells technicians to clear a merely stored code instead of replacing the unit. A Bosch patent describes resetting an offset fault only after a successful check while driving. Practically, the module limits ABS/ESC functions until the scan tool calibration has passed.
C059D at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.3 to 1.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of C059D
- ABS and ESC warning lamps on
- Brake pressure based functions such as hill hold or brake blending limited
Common causes of C059D
- Most likelyCalibration of the sensor not done after hydraulic unit or module replacement
- PossibleCode stored from an earlier event, sensor already calibrated
- Less likelyBrake module losing calibration data in its memory
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Brake pressure sensor dBrake control module
What each part of C059D means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 9D | The exact fault in that area. |
What to do next
- Note C059D 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 C059D
What does C059D mean?
C059D means "Brake Pressure Sensor D Missing Calibration". C059D flags missing calibration data for a fourth hydraulic pressure sensor. It is a generic code, so it means the same on every make.
Is it safe to drive with C059D?
Drive gently and only to a workshop. With C059D the car can go into limp mode (reduced power) to protect itself.
Will C059D fail an emissions test?
C059D 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 C059D to fix?
Difficulty: workshop only. A typical repair takes 0.3 to 1.5 hours of work. This is a job for a workshop.
Will C059D clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.