Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is getting a signal from the cruise control system that's too high. It's like when the volume on a radio is turned up too loud and it sounds distorted.
The P0581 code is triggered when the Powertrain Control Module (PCM) detects a high voltage signal from the cruise control multi-function input circuit.
The cruise control system in vehicles is designed to maintain a set speed without the driver having to keep their foot on the accelerator. The multi-function input circuit is part of this system and is responsible for sending signals to the PCM. When the PCM detects that the voltage in this circuit is higher than expected, it sets the P0581 code.
• Cruise control not working
• Check Engine Light on
• Unresponsive cruise control buttons
• Faulty cruise control switch
• Short to voltage in the cruise control circuit
• Faulty wiring or connectors
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Check the cruise control switch for proper operation.
• Inspect the wiring and connectors for damage or corrosion.
• Test the voltage in the cruise control circuit.
• Replace the faulty cruise control switch.
• Repair or replace damaged wiring or connectors.
• Clear the code and test the system.
• Multimeter
• OBD-II scanner
• Screwdriver set
$100 - $300
Moderate
• Ford Focus
• Chevrolet Malibu
• Toyota Camry
• Regularly inspect the cruise control system.
• Ensure wiring and connectors are free from corrosion.
• Use the cruise control system as per the manufacturer's instructions.
Sensor Issue
• Avoid using cruise control until the issue is resolved.
• Consult a professional mechanic for diagnosis and repair.
Check with the vehicle manufacturer for warranty coverage on the cruise control system.
P0581 is a relatively common code that has been reported across various vehicle models with electronic cruise control systems.
Moderate – The vehicle can still be driven, but the cruise control feature will not function properly.
Driving without a functioning cruise control system is not illegal but may affect long-distance driving comfort.
• Vehicle at operating temperature
• Cruise control system engaged
The cruise control switch is typically located on the steering wheel or the steering column.
Q: Can I drive my car with a P0581 code?
A: Yes, but the cruise control function will not work properly.
Q: Will fixing the P0581 code improve fuel efficiency?
A: Fixing the cruise control system may help maintain steady speeds, potentially improving fuel efficiency on highways.
Pro · Four-system diagnostics
A handheld scanner aimed at engine, transmission, ABS, and airbag diagnostic work.
Chassis and ABS faults usually need a scanner that can read brake-system data directly.
View on Amazon
Universal · Torque wrench
Useful when reassembly torque matters for wheel, suspension, and under-hood fasteners.
Useful when wheel, hub, or suspension hardware needs correct reassembly torque.
View on Amazon
Universal · Drive-on ramps
Helpful for safer access underneath the vehicle during exhaust, EVAP, and underbody inspection work.
Helpful for safer access during underbody inspection work.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.