Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the car's cruise control system. It's like when a remote control doesn't work right because a button is stuck or not working properly.
The P0579 code indicates that the cruise control system's input circuit is not operating within the expected range or performance parameters.
The cruise control system in a vehicle allows the driver to set a speed that the vehicle will maintain without using the accelerator pedal. The Multi-Function Input A Circuit is part of this system, and it includes various inputs like switches and sensors. When the Engine Control Module (ECM) detects that the input from this circuit is out of the expected range, it triggers the P0579 code.
• Cruise control not working
• Check Engine Light on
• Inconsistent vehicle speed
• Faulty cruise control switch
• Damaged or corroded wiring/connectors
• Faulty ECM or PCM
ECM: Engine Control Module
PCM: Powertrain Control Module
• Check for other related trouble codes.
• Inspect the cruise control switch for damage.
• Examine wiring and connectors for corrosion or damage.
• Replace the faulty cruise control switch.
• Repair or replace damaged wiring/connectors.
• Reprogram or replace the ECM/PCM if necessary.
• OBD-II scanner
• Multimeter
• Screwdriver set
$100 - $500
Moderate
• Ford F-150
• Honda Accord
• Toyota Camry
• Regularly inspect cruise control system components.
• Keep electrical connections clean and dry.
• Avoid using cruise control in adverse conditions.
Sensor Issue
• Avoid using cruise control until the issue is resolved.
• Consult a professional mechanic if unsure about DIY repairs.
Check with your vehicle manufacturer; cruise control components may be covered under certain warranties.
The P0579 code has been reported across various makes and models, often due to wear and tear of the cruise control switch over time.
Moderate – While the vehicle can still be driven, the cruise control feature will not function properly, which could be inconvenient for long trips.
Driving without a functioning cruise control system is generally safe, but be cautious as it may affect your ability to maintain a constant speed.
• Vehicle must be in motion.
• Cruise control system must be activated.
The cruise control switch is typically located on the steering wheel or the steering column.
Q: Can I drive my car with a P0579 code?
A: Yes, you can drive your car, but the cruise control feature may not work properly.
Q: Will a P0579 code affect my car's performance?
A: It won't affect the overall performance, but the cruise control system will not function correctly.
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