Code C0583 signals an open circuit in the brake booster motor B's phase U, V, and W windings. This usually prevents the electric brake booster from receiving proper power, reducing or eliminating power assist.
The motor's internal windings for phases U, V, or W can open due to wear or manufacturing defect, causing a circuit‑open condition.
Broken wires, chafed insulation, or a loose/dirty connector at the motor can interrupt power to one or more phases.
Moisture or corrosion on the connector pins can increase resistance and create an apparent open circuit.
A fuse protecting the motor may have opened, removing power to the phases.
The PCM's output transistor that supplies power to the motor phases can fail, but this is less common than motor or wiring issues.
Usually not; the most common cause is a failed motor or a wiring/connector issue, and PCM failure is rare.
It is generally replaced as a unit; internal winding failures are not typically repaired in the field.
Yes, the code will clear once the circuit is restored and the system completes a drive cycle without detecting the fault.
Yes, a blown fuse in the brake booster motor circuit will trigger an open‑circuit condition and set C0583.