Cruise Control Vacuum Control Circuit Open
The P0582 code indicates that the Powertrain Control Module (PCM) has detected an open circuit in the cruise control vacuum control circuit. This circuit controls the vacuum actuator that adjusts throttle position to maintain set speed. An open circuit means there is a break in the electrical path, preventing the vacuum solenoid from operating correctly. This can be caused by a faulty vacuum control solenoid, damaged wiring, or a poor electrical connection.
1. Most Common Causes
- Faulty cruise control vacuum control solenoid
- Open or shorted wiring in the vacuum control circuit
- Corroded or loose electrical connector
- Failed PCM (rare)
2. Symptoms You Will Notice
- Cruise control inoperative
- Check Engine Light illuminated
- Cruise control light on dash may flash or stay off
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm P0582 and check for other codes.
Step 2: Visually inspect the vacuum control solenoid and its wiring for damage or corrosion.
Step 3: Test the solenoid resistance with a multimeter; compare to manufacturer specs.
Step 4: Check for battery voltage and ground at the solenoid connector with the ignition on.
Step 5: If voltage and ground are present, replace the solenoid. If not, repair the wiring or connector.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
Yes, it is safe to drive, but cruise control will not work. The vehicle will operate normally otherwise.
How much does it cost to fix?▼
Typically $50-$150 for parts and labor, depending on the cause and vehicle model.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.