Code Definition

P0584 — Cruise Control Vacuum Circuit High

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0584

P0584 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0584 is stored, the module has detected a signal or supply voltage higher than the expected operating range.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0584 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

This fault code is set when the engine control module (ECM) or the body control module (BCM) detects an abnormally high signal or fault in the cruise control vacuum circuit. This circuit is a key component in vehicles that utilise vacuum actuators for the operation of the cruise control system. A high signal in this context typically indicates a malfunction where the vacuum circuit is not regulating the pressure correctly, which can result in the cruise control system being unable to engage or maintain the set speed properly.

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