OBD-II code P0583 indicates that the engine control module (ECM) has detected a low voltage condition in the cruise control vacuum control circuit. This circuit typically controls a vacuum solenoid that operates the cruise control servo, and a low signal suggests a short to ground, open circuit, or a failed component.
The vacuum solenoid or actuator may have an internal short or open circuit, causing a low voltage reading in the control circuit.
Cracked, disconnected, or leaking vacuum hoses can prevent proper operation and trigger a low circuit code.
A short to ground, open circuit, or high resistance in the wiring between the ECM and the vacuum actuator can cause a low voltage signal.
If the vehicle uses a separate cruise control module, an internal failure may send an incorrect signal to the ECM.
In rare cases, an internal driver failure in the ECM can cause a low circuit condition, but this should only be considered after all other causes are ruled out.
Yes, the vehicle is safe to drive, but the cruise control system will be disabled.
Ignoring the code won't cause immediate harm, but you will lose cruise control functionality until the issue is resolved.
Almost never. The PCM is rarely the cause; always check the vacuum actuator, hoses, and wiring first.
A failed cruise control vacuum actuator, vacuum leaks, or damaged wiring are the most frequent causes.