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P0578 Severity
Once the vehicle's onboard system no longer detects the issue, most codes will disappear on their own. If your vehicle still has this code, however, it should be properly diagnosed to avoid a more serious problem.
For a proper diagnosis, RepairPal Certified shops have the equipment, tools, and expertise.
Moderate severity codes might not threaten the vehicle's safety or functionality immediately, but you should still get it diagnosed within a reasonable time frame to keep your car running well.
The Cruise Control System is controlled by the Body Control Module. The Body Control Module monitors driver inputs to the cruise control system and sends that request to the engine computer (PCM). If the body control module detects an invalid input from the cruise control switches, code P0578 will be set.
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OBD-II Code Cruise control will not operate is defined as a Cruise Control Multi-Function Input "A" Circuit Stuck
The Cruise Control System is controlled by the Body Control Module. The Body Control Module monitors driver inputs to the cruise control system and sends that request to the engine computer (PCM). If the body control module detects an invalid input from the cruise control switches, code P0578 will be set.