C0580 on 2009-2014 Cadillac CTS-V — Brake Booster Motor A Phase U/V/W Circuit Low
1 vehicles · 1 makes
How to diagnose and fix C0580: most-reported vehicles
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Cadillac CTS-V · 2009–2014
GM PI0430C covers 2009-2014 Cadillac CTS-V vehicles with Magnetic Ride Control when the Service Suspension System message appears with DTC C0575, C0580, C0585 or C0590. A 90-degree electrical connector at the top of a shock actuator may be incompletely seated or partially disconnected; the bulletin does not establish universal shock failure.
Common Symptoms
- Service Suspension System message
How to Fix
Follow PI0430C connector inspection, seating and circuit checks before replacing a shock absorber. Continue normal service-information diagnosis if the connector path does not resolve the message or DTC.
Sources for this issue (1)
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C0580 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does C0580 mean?
C0580 stands for "Brake Booster Motor A Phase U/V/W Circuit Low." A chassis code for the electric brake booster (electro-hydraulic / regenerative brake assist) used on hybrids, EVs, and many late-model vehicles with brake-by-wire assist. The brake-assist control module drives the booster motor through a three-phase (U/V/W) inverter and sets C0580 when the voltage on one or more phase circuits is below the threshold required for normal operation. Expect a hard, high-effort brake pedal, loss of power assist, and brake warning lamps. This is a safety-relevant fault — the vehicle can still be stopped but takes substantially more pedal force, and it should be diagnosed before further driving. Related codes in the same family cover the B motor (C0583-C0585).
What are the most common causes of C0580?
The most common causes of C0580 are: Failed brake booster / brake-assist control module (internal motor driver, MOSFET, or regulator failure), Open, shorted, or corroded wiring in the three-phase motor circuit, Poor connection or corrosion at the booster motor connector, Low system voltage or a bad power/ground feed to the brake-assist module, Failed booster motor windings, Related software calibration issue — check manufacturer bulletins before replacing the booster assembly. The specific cause varies by vehicle.
How much does it cost to fix C0580?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by C0580?
Au7o has documented C0580 across 1 vehicle models from 1 manufacturers: Cadillac.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.