C0583 code meaning
Brake Booster Motor B Phase U-V-W Circuit/Open
What C0583 means
C0583 refers to the second motor or second winding system, B, of an electric brake booster and reports an interrupted phase path there. Not every booster has a B side: GM's public tables diagnose motor A only, and no manufacturer documents C0583 in this meaning. GM's keyword list for 2014 and older vehicles (PIP5094) contains C0583 from an earlier numbering. A B channel makes sense in redundant layouts such as the dual-winding gear motor in a Hyundai Mobis patent, where two power modules each feed one three-phase winding and either one can carry the full current. An open B phase is found the same way as on side A, for example using the driver chip's open-load check. The module drops the faulty channel; depending on design, assist continues on A or is reduced.
C0583 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of C0583
- Brake warning lamp with a service message
- Weaker or slower brake assist if only side A remains
Common causes of C0583
- PossibleOpen winding or internal phase connection of motor/winding system B
- PossiblePower module B with a transistor that no longer conducts
- PossibleLoose or corroded phase contact on the B side
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Brake booster motor bMotor phase wiring
What each part of C0583 means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 83 | The exact fault in that area. |
What to do next
- Note C0583 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 C0583
What does C0583 mean?
C0583 means "Brake Booster Motor B Phase U-V-W Circuit/Open". C0583 refers to the second motor or second winding system, B, of an electric brake booster and reports an interrupted phase path there. It is a generic code, so it means the same on every make.
Is it safe to drive with C0583?
Drive gently and only to a workshop. With C0583 the car can go into limp mode (reduced power) to protect itself.
Will C0583 fail an emissions test?
C0583 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 C0583 to fix?
Difficulty: hard. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will C0583 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.