What it means
This code has no standardized generic meaning in the SAE/ISO list. Its meaning, if used by your vehicle, depends on the manufacturer.
How it works
C0583 is listed here as a Brake Booster Motor B U, V, and W phase circuit/open fault, but it has no standardized generic definition. The vehicle manufacturer's information is needed to establish what Motor B circuit the module monitors and how it detects an open.
Common causes
Most likely first.
- Manufacturer-specific code definition
- Vehicle-specific diagnostic data needed
Symptoms
- Symptoms depend on the vehicle-specific fault
How to diagnose it
- Record the exact code, reporting module, and accompanying codes with a scan tool before clearing them.
- Look up C0583 in the vehicle's service information to confirm the Motor B phase circuit definition and test points.
- Review freeze-frame or fault-event data and available brake-booster live data for clues about when the fault occurred.
- Inspect the identified Motor B connector and harness for unplugged connectors, broken wires, pushed-back pins, corrosion, or chafing.
- Test circuit continuity and related motor or module connections using the manufacturer's procedure before replacing parts.
Common fixes
- Reconnect a loose Motor B phase connector after checking for terminal damage.
- Repair an open or broken wire in the identified phase circuit.
- Repair or replace corroded or damaged connector terminals.
- Replace the motor or control module only if vehicle-specific testing confirms it is faulty.
Can I keep driving?
The generic code does not confirm whether brake assist is affected. If a brake warning appears or assist changes, stop driving when safe and arrange diagnosis; confirm the vehicle-specific definition promptly.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.