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Why wont my cruise control engage?

If your cruise control is not engaging, there could be several potential reasons. The most common issues include problems with the cruise control switch, the brake pedal sensor, the clutch pedal sensor (for manual transmissions), or the vehicle's computer system. Let's explore these potential causes in more detail.


Cruise Control Switch Issues


The cruise control switch is the main interface between the driver and the cruise control system. If the switch is faulty or not properly connected, the cruise control will not engage. Check the cruise control switch for any signs of damage or loose connections. You may need to replace the switch if it is not functioning correctly.


Brake Pedal Sensor Problems


The brake pedal sensor is responsible for detecting when the driver presses the brake pedal, which automatically disengages the cruise control. If the sensor is malfunctioning, it may not be properly communicating with the vehicle's computer, preventing the cruise control from engaging. Inspect the brake pedal sensor for any issues and consider replacing it if necessary.


Clutch Pedal Sensor Malfunctions (Manual Transmissions)


For vehicles with manual transmissions, the cruise control system also relies on a clutch pedal sensor to disengage the cruise control when the driver presses the clutch. If this sensor is faulty, the cruise control may not engage. Check the clutch pedal sensor and replace it if it is not functioning correctly.


Vehicle Computer System Issues


The vehicle's computer system, also known as the engine control unit (ECU) or powertrain control module (PCM), is responsible for managing the cruise control system. If there are any issues with the computer system, such as a software glitch or a hardware problem, it could prevent the cruise control from engaging. In this case, you may need to have the computer system diagnosed and repaired by a professional mechanic.


If you have ruled out the above potential causes and your cruise control still won't engage, there may be other underlying issues with your vehicle's electrical system or other components. It's best to have a qualified mechanic inspect your vehicle to diagnose and resolve the problem.

How do I get my cruise control to work?


To use cruise control, you can typically press buttons on your steering wheel to activate the system, set your speed, adjust your speed up or down within the system, and deactivate the system. Using cruise control lets you set a speed for your car to maintain even if you take your foot off the gas.



How do I reset my cruise control?


How to Reset Adaptive Cruise Control

  1. Step 1: Consult Your Vehicle's Owner's Manual.
  2. Step 2: Start Your Vehicle.
  3. Step 3: Access the ACC Menu.
  4. Step 4: Select 'Reset' or 'Default'
  5. Step 5: Press and Hold the Reset Button.
  6. Step 6: Confirm the Reset.
  7. Step 7: Monitor System Reset.
  8. Step 8: Verify ACC Reset.



Why is my cruise control not engaging?


First thing to try when cruise won't engage is lift up on the brake pedal with your foot then try cruise again (while holding up the pedal). There is a known problem with the switch, usually just needs adjusting, worst case scenario replacing.



Can I fix cruise control to my car?


It can be installed by anyone who knows what is accelerator pedal, and the process is simple and straightforward. The best part? If you decide to sell your car or upgrade to a new one, you can easily remove the cruise control system and transfer it to your new vehicle.



How do I know if my cruise control fuse is blown?


You can check to see if a fuse is blown by checking the fuse box and locate the fuse that corresponds to your cruise control. You'll need to remove the fuse and perform a visual inspection to see if a filament on the inside is broken, indicating that the fuse is bad. If the filament is intact it's most likely fine.



How do I know if my cruise control switch is bad?


A malfunctioning switch can show both symptoms. It may not turn on at all or does not turn off even after applying the brake. In that case, the car will continue accelerating, which may lead to an accident. Also, continuous acceleration may cause the related components to overheat and then get damaged permanently.



What are the signs of a failing cruise control?


Not Maintaining Consistent Speed
When you've set the cruise control, it should always maintain the speed you've set. If you notice that your speed fluctuates after setting it, your system may be malfunctioning. To determine if you have a problem, try resetting the system.



Can a bad fuse cause cruise control not to work?


Seeing your vehicle cruise control is powered by an electronic control unit, it is susceptible to damage by a blown fuse or other certain electrical damage. Common causes for your vehicle's cruise control to not work include: Bad Fuse - Common cause of failed cruise control system.



Is it expensive to fix cruise control?


The average cost for a Cruise Control Module Replacement is between $630 and $643. Labor costs are estimated between $50 and $63 while parts are typically priced around $581. This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed.



What is the most common failure of a cruise control system?


Blown Fuse
One of the most common reasons for a malfunctioning cruise control system is a blown fuse. Fuses are designed to protect electrical components from power surges and prevent damage. If the fuse for the cruise control system has blown, it will prevent the system from functioning.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.