P0579 Ford Code - Cruise Control Multifunction Input 'A' Circuit Range/Performance
Quick Answer
The P0579 code in a Ford vehicle indicates an issue with the Cruise Control Multifunction Input 'A' Circuit Range/Performance. Common causes include Faulty cruise control module, Damaged wiring or connectors in the cruise control system, Defective cruise control switch. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- P0579 Ford indicates Cruise Control Multifunction Input 'A' Circuit Range/Performance.
- Common causes
- Common causes include Faulty cruise control module, Damaged wiring or connectors in the cruise control system, Defective cruise control switch.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
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Code P0579 Ford Description
The P0579 code in a Ford vehicle indicates an issue with the Cruise Control Multifunction Input 'A' Circuit Range/Performance. This means that the vehicle's onboard computer has detected a problem with the input signal from the cruise control system. The cruise control system is responsible for maintaining a set speed without the driver needing to press the accelerator pedal constantly. When this code is triggered, it can affect the vehicle's ability to maintain a constant speed, potentially leading to erratic behavior or the cruise control system not functioning at all.
Common Causes of P0579 Ford
- Faulty cruise control module
- Damaged wiring or connectors in the cruise control system
- Defective cruise control switch
- Issues with the vehicle's computer or software
- Sensor malfunction within the cruise control system
Symptoms of P0579 Ford
- Cruise control not engaging or maintaining a set speed
- Erratic behavior when using cruise control
- Check Engine Light illuminated
- Vehicle speed fluctuations
- Reduced fuel efficiency
How to Fix P0579 Ford
- Start by performing a thorough inspection of the cruise control components, including the module, wiring, and connectors, to identify any visible damage or issues.
- Use a diagnostic scanner to retrieve the trouble codes stored in the vehicle's computer and pinpoint the exact cause of the problem.
- Test the cruise control switch and sensors to ensure they are functioning correctly.
- Replace any faulty components identified during the inspection, such as the cruise control module, wiring harness, or sensors.
- Clear the trouble codes from the vehicle's computer and test the cruise control system to ensure proper functionality.
Cost to Fix P0579 Ford
The cost of repairing a P0579 code in a Ford vehicle can vary depending on the specific cause of the issue and the labor rates at the repair shop. On average, the repair costs for this type of problem can range from $100 to $300, including parts and labor. However, it's important to note that prices may fluctuate based on the location, vehicle model, and the severity of the issue. Additionally, diagnostic time and labor rates at auto repair shops can impact the overall cost, so it's recommended to inquire with local shops for a more accurate estimate.
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