Kia K5 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Kia K5 and How to Fix Them

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Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
0%
25% chance it's the
Control Module
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a Kia K5 cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
  • Sensor: A faulty or malfunctioning sensor can lead to incorrect readings, causing issues with engine performance or other systems relying on accurate data.
  • Control Module: A faulty control module can lead to erratic vehicle behavior or failure of various electronic systems due to improper signal processing.
  • Throttle: A faulty throttle body or a defective accelerator pedal position sensor may be causing inconsistent throttle response.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a Kia K5 cruise control isn't working?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

When the vehicle speed sensor fails or the wiring harness prevents signal transmission, the speedometer is the first thing that will stop functioning properly. This can be an intermittent issue where the speedometer only works occasionally, the speedometer may cease all function, or the speedometer may read erratically or incorrectly. Also, the traction control and anti lock brake warning lights specific to each vehicle may be illuminated, depending on the design of those systems. You may notice the vehicle hesitate to accelerate, cruise control will not function properly, and the vehicle may not shift properly through all of the gears.

In the event that a wheel speed sensor fails, the ABS, traction control system (TCS) and manufacturer specific stability control system lights will illuminate, informing the driver that the systems are disabled. The vehicle will be more prone to tire slip, and normal driving patterns may need to be adjusted to correct for the loss of computer control. On older vehicle's, the speedometer can be affected, causing illumination of the check engine light as well.

The cruise control switch can cause complete failure of the cruise control feature, but in a lucky scenario only partial functionality will be lost. This means that the cruise control may come on, but that it will not increase in speed automatically, or the cancel button does not work leading the driver to cancel cruise control with the foot brake. In some vehicles, the cruise control light may illuminate, or a warning message may be displayed due to lack of functionality.

Troubleshooting Cruise Control Issues in a Kia K5

When troubleshooting cruise control issues in your Kia K5, start with the basics to identify the problem efficiently. Begin by checking the fuse associated with the cruise control system, as a blown fuse can easily disrupt functionality. Next, inspect the brake pedal switch; if it’s defective, it may prevent the cruise control from engaging properly. If these initial checks do not resolve the issue, examine the throttle position sensor, as a malfunction here can lead to erratic behavior, including black exhaust emissions. Additionally, ensure that the control module and any related sensors are functioning correctly, as these components are crucial for the system's operation. If you encounter specific error messages, such as "Check cruise control system," it’s vital to address these promptly. Should these steps not yield results, consulting a qualified technician may be necessary to diagnose and repair more complex issues effectively. By following this diagnostic approach, you can systematically identify and resolve cruise control problems in your Kia K5, ensuring a safer and more enjoyable driving experience.

What Are the Common Causes of Cruise Control Malfunction in a Kia K5?

When troubleshooting cruise control malfunctions in a Kia K5, it's essential to consider several common problems that can arise. One of the primary culprits is a failed control module, sensor, or switch, which can disrupt the system's functionality. Additionally, throttle actuation issues may prevent the cruise control from engaging properly, leading to frustration during drives. It's also important to check for blown fuses, as these can interrupt the power supply to the cruise control system. Other potential issues include a malfunctioning brake pedal position sensor, which can falsely signal that the brakes are engaged, and problems with the throttle body or the PRNDL/shifter position switch. Lastly, a defective brake pedal switch or complications within the throttle control system can also contribute to cruise control failures. By systematically examining these components, DIYers can effectively diagnose and address the underlying issues affecting their Kia K5's cruise control system.

Why is the Cruise Control Not Working in a Kia K5?

When the cruise control in your Kia K5 malfunctions, it’s crucial to address the issue promptly to avoid safety risks and further damage to your vehicle. Common causes such as a failed control module, faulty sensors, or issues with the throttle actuation can lead to erratic vehicle behavior, which may compromise your driving safety. Ignoring symptoms like a non-responsive cruise control can escalate into more significant problems, such as engine performance issues or increased fuel consumption, particularly if the throttle position sensor is involved. Additionally, a blown fuse or a defective brake pedal switch can disrupt the cruise control system, potentially leading to unexpected acceleration or deceleration while driving. By diagnosing and resolving these issues early, you not only enhance your driving experience but also prevent costly repairs down the line, making it essential for any DIY enthusiast to take these symptoms seriously.

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