C0582Brake Booster Motor A Phase U-V-W Circuit Range/Performance
- Generic OBD-II code · Chassis
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- C0582 is the plausibility check of the drive stage for booster motor A and the best documented code of this group. GM's 2016/2019 hybrid tables switch an upper and a lower transistor of different phases in all six pairings and trip above 150 A; the 2023/2025 EBCM tables expect an idle phase at 1.65 V during start-up and also file a temperature-sensor plausibility test here. Type A, MIL. GM bulletin 22-NA-100 (2022 Cadillac XT5/XT6, Chevrolet Blazer, GMC Acadia with eBoost) reports check engine, traction and ABS lamps and possible loss of assist in a panic stop: reprogram if stored, new BSCM if active. Stellantis tells Jeep Wagoneer dealers to renew eBooster and BSCM together; GM's PIC6614 says Lyriq codes may show only in OnStar data.
- What you may notice
- Check engine, traction control and ABS lamps on together
- Brake assist failure message, abnormal pedal feel
- Reduced assist especially during hard or panic braking
- Likely causes
- LikelySoftware fault in the brake system control module (GM 22-NA-100, fixed by reprogramming)
- PossibleDefective bridge driver or shorted transistor pair in the drive stage
- PossibleInternal fault of the eBooster unit, requiring booster and module replacement
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €3,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.