C0580 code meaning
Brake Booster Motor A Phase U-V-W Circuit Low
Chassis system Generic code C05xx codes Check engine light
What C0580 means
C0580 flags a phase of booster motor A that is pulled too low, or a driver stage that cannot lift it properly. GM's 2016 and 2019 hybrid tables use it when the gate-drive supply of the bridge driver falls too far below the motor supply (7 V limit, 5 ms). In the 2019 IBC unit it covers a phase that does not drop under 0.99 V while its lower transistor conducts, a phase already near 0 V before the bridge is enabled, and an undercharged bootstrap capacitor – all Type A with MIL. Automotive gate drivers such as TI's DRV8305-Q1 report this charge-pump undervoltage themselves. Note the older meaning: on the 2011 Saab 9-5 and related GM cars, C0580 was the right front damper actuator of the adaptive suspension. In the booster meaning the module normally switches assist off.
C0580 at a glance
- Check engine lightYes, usually on
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of C0580
- Electric brake assist off, pedal feels hard
- Brake and stability warning lamps, on GM also the check engine lamp
- Fault may appear right after switching the ignition on
Common causes of C0580
- Most likelyGate-driver or charge-pump supply in the brake module too low (internal defect or weak supply)
- PossiblePhase lead of motor A chafed through and shorted to ground
- PossibleLower bridge transistor shorted or permanently driven
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Brake booster motor aMotor phase wiring
What each part of C0580 means
| C | Chassis system: brakes, ABS, steering and suspension. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 80 | The exact fault in that area. |
What to do next
- Note C0580 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 C0580
What does C0580 mean?
C0580 means "Brake Booster Motor A Phase U-V-W Circuit Low". C0580 flags a phase of booster motor A that is pulled too low, or a driver stage that cannot lift it properly. It is a generic code, so it means the same on every make.
Is it safe to drive with C0580?
Drive gently and only to a workshop. With C0580 the car can go into limp mode (reduced power) to protect itself.
Will C0580 fail an emissions test?
C0580 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 C0580 to fix?
Difficulty: hard. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will C0580 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.