Kia Sportage 2020: Cruise Control Troubleshooting

Nov 14, 2025 by Alex Braham 50 views

Hey guys! Let's dive into troubleshooting the cruise control system on your Kia Sportage 2020. Cruise control is one of those features you don't realize how much you depend on until it stops working. Whether you're gearing up for a long road trip or just trying to ease your daily commute, a malfunctioning cruise control can be a real pain. So, let’s get into the nitty-gritty of diagnosing and fixing the issue.

Understanding the Cruise Control System

Before we jump into troubleshooting, it’s essential to understand the basics of how the cruise control system works in your 2020 Kia Sportage. The system consists of several components working in harmony to maintain your desired speed. These include:

Cruise Control Module: The brain of the operation. It receives inputs from various sensors and controls the throttle to maintain speed.
Speed Sensors: These sensors, usually located at the wheels, provide data to the module about the vehicle's current speed.
Brake Light Switch: This switch detects when the brake pedal is pressed, signaling the cruise control to disengage for safety.
Steering Wheel Controls: Buttons on the steering wheel allow you to set, adjust, and cancel the cruise control.
Throttle Actuator: This component adjusts the throttle position based on commands from the cruise control module to maintain the set speed.

When everything is functioning correctly, you should be able to set your desired speed, and the system will automatically adjust the throttle to maintain that speed, even when going uphill or downhill. Understanding these components is the first step in diagnosing what might be causing your cruise control to fail.

Common Causes of Cruise Control Problems

So, what could be causing your 2020 Kia Sportage's cruise control to give you trouble? Here are some of the most common culprits:

Faulty Brake Light Switch: A malfunctioning brake light switch is a frequent offender. If the switch is faulty, it might send an incorrect signal to the cruise control module, making it think the brakes are being applied, which will disengage the cruise control. To test this, check if your brake lights are working correctly. If they're not, the switch is likely the issue.
Blown Fuse: Like any electrical system, the cruise control relies on fuses to protect it from power surges. A blown fuse can cut power to the system, rendering it useless. Check your owner's manual to locate the cruise control fuse and inspect it. If it's blown, replace it with a new one of the same amperage.
Speed Sensor Issues: If one or more of your speed sensors are failing, the cruise control module won't receive accurate speed data, preventing it from functioning correctly. Faulty speed sensors can also affect other systems like ABS and traction control, so watch out for related warning lights on your dashboard.
Wiring Problems: Damaged or corroded wiring can disrupt the signals between the various components of the cruise control system. Inspect the wiring harnesses and connectors for any signs of damage or corrosion. Pay special attention to areas exposed to the elements or physical stress.
Cruise Control Module Failure: Although less common, the cruise control module itself can fail. This is usually due to electrical issues or internal component failure. If you've ruled out all other possibilities, the module might be the problem. A diagnostic scan by a professional mechanic can confirm this.
Software Glitches: Modern cars rely heavily on software, and sometimes glitches can occur. A software issue in the cruise control module or the car's computer system can cause the cruise control to malfunction. In some cases, a software update from the dealer can resolve the problem.

Step-by-Step Troubleshooting Guide

Okay, let's get our hands dirty and start troubleshooting your cruise control issue. Follow these steps to diagnose and potentially fix the problem:

Check the Basics: Before diving into complex diagnostics, start with the basics. Make sure the cruise control system is turned on. Most Kia Sportage models have a main cruise control switch, often located on the steering wheel or dashboard. Ensure it's in the "on" position.
Inspect the Fuses: Locate the fuse box, usually under the dashboard or in the engine compartment. Consult your owner's manual to find the fuse specifically for the cruise control system. Visually inspect the fuse. If the wire inside is broken or the fuse looks burnt, replace it with a new one of the same amperage.
Verify Brake Lights: Have someone stand behind your car while you press the brake pedal. Check if all brake lights are working correctly. If one or more lights are out, replace the bulbs and test the cruise control again. If the brake lights are not working at all, the brake light switch is likely the problem.
Scan for Error Codes: Use an OBD-II scanner to check for any error codes related to the cruise control system, ABS, or speed sensors. These codes can provide valuable clues about the source of the problem. Write down any codes you find and research them online or consult a mechanic.
Test the Brake Light Switch: The brake light switch is usually located near the brake pedal. You can test it using a multimeter to check for continuity. With the brake pedal released, the switch should show continuity. When the pedal is pressed, the continuity should break. If the switch doesn't behave as expected, replace it.
Check Speed Sensors: If you suspect a speed sensor issue, use an OBD-II scanner that can read individual wheel speed data. Compare the readings from each sensor while driving at a slow, steady speed. If one sensor shows a significantly different reading than the others, it's likely faulty and needs to be replaced.
Inspect Wiring and Connectors: Carefully inspect the wiring harnesses and connectors associated with the cruise control system. Look for any signs of damage, corrosion, or loose connections. Clean any corroded connectors with electrical contact cleaner and ensure all connections are secure.
Reset the System: Sometimes, simply resetting the cruise control system can resolve minor glitches. Disconnect the car's battery for about 15 minutes, then reconnect it. This can reset the car's computer and potentially clear any temporary software issues.

When to Call a Professional

While many cruise control issues can be resolved with DIY troubleshooting, some problems require the expertise of a professional mechanic. Consider seeking professional help if:

You're Not Comfortable Working on Cars: If you're not confident in your ability to diagnose and repair car problems, it's best to leave it to the pros. Messing with the car's electrical system can be risky if you don't know what you're doing.
You Can't Find the Source of the Problem: If you've gone through the troubleshooting steps and still can't identify the cause of the cruise control malfunction, a professional mechanic has the tools and expertise to diagnose the issue accurately.
Error Codes Indicate Complex Problems: Some error codes can indicate more complex issues that require specialized equipment and knowledge to resolve. In these cases, it's best to consult a professional.
The Cruise Control Module is Faulty: Replacing the cruise control module often requires programming and calibration, which is best left to a professional with the necessary tools and software.

Preventing Future Cruise Control Problems

Once you've resolved your cruise control issue, you'll want to take steps to prevent it from happening again. Here are some tips to keep your cruise control system in good working order:

Regular Maintenance: Follow your car's recommended maintenance schedule, including inspections of the electrical system and sensors. Regular maintenance can help identify and address potential problems before they cause a breakdown.
Keep Your Car Clean: Dirt, salt, and other debris can corrode wiring and connectors, leading to electrical problems. Regularly wash your car, especially during the winter months, to remove these contaminants.
Address Warning Lights Promptly: If you notice any warning lights on your dashboard, such as the ABS or traction control light, address them promptly. These lights can indicate underlying issues that could affect the cruise control system.
Avoid Overloading the Electrical System: Avoid adding too many aftermarket accessories that draw power from the car's electrical system. Overloading the system can cause electrical problems and potentially damage the cruise control module.
Drive Carefully: Avoid driving in harsh conditions or on rough roads that can damage sensors and wiring. Driving carefully can help extend the life of all your car's components, including the cruise control system.

Conclusion

So, there you have it – a comprehensive guide to troubleshooting cruise control problems on your 2020 Kia Sportage. Remember, a systematic approach and attention to detail are key to diagnosing and resolving the issue. And if you ever feel overwhelmed or unsure, don't hesitate to seek the help of a professional mechanic. Happy driving, and may your cruise control always be smooth sailing!