This code indicates that the brake booster control module has detected a range or performance problem in the three-phase (U, V, W) motor circuit of an electric/electromechanical brake booster. The booster motor is not responding within expected electrical parameters, which can reduce or alter brake assist.
The three-phase brushless motor inside the brake booster assembly has an internal winding fault, open phase, or mechanical binding causing out-of-range performance. This is the most common root cause for this code.
An open, short, or high-resistance connection on one or more of the U, V, or W phase wires between the booster motor and its control module causes the module to detect improper motor performance.
Moisture intrusion, pin corrosion, bent pins, or connector lock failure at the brake booster motor connector can cause intermittent or out-of-range readings on one or more phases.
The brake booster assembly requires stable voltage and a good ground. A weak power feed or corroded ground can cause the motor to underperform and trigger this code.
The internal control module that drives the three-phase motor has failed or is misinterpreting phase feedback. This is less common than motor or wiring faults but possible.
Brake assist may be reduced, meaning you may need to press the pedal harder to stop. The vehicle should be inspected promptly and driven minimally until repaired.
No. This code relates to the brake booster motor and its dedicated control module, not the powertrain control module. Replacing the PCM will not fix this code and is not an appropriate repair for C0582.
You can clear it, but if the underlying motor, wiring, or connector fault remains, the code will return—often during the next brake application or drive cycle.
No. This code applies to vehicles equipped with electric or electromechanical brake boosters. Traditional vacuum-assisted brake boosters do not use a three-phase motor and will not set this code.