Chassis, generic

C0582 Brake Booster Motor A Phase U-V-W Circuit Range/Performance

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Software fault in the brake system control module (GM 22-NA-100, fixed by reprogramming)
Defective bridge driver or shorted transistor pair in the drive stage
Internal fault of the eBooster unit, requiring booster and module replacement

Symptoms

  • Check engine, traction control and ABS lamps on together
  • Brake assist failure message, abnormal pedal feel
  • Reduced assist especially during hard or panic braking

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–3,500
Time0.5–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

brake booster motor abrake system control module

Related codes

C057FC0580C0581C058AC0586

References: static.nhtsa.gov, gsi.ext.gm.com, gsi.ext.gm.com, static.nhtsa.gov.