Hyundai XG350 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Hyundai XG350 and How to Fix Them

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Reviewed by
Aisha
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
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25% chance it's the
Control Module
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25% chance it's the
Throttle
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20% chance it's
Something else
The most common reasons a Hyundai XG350 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 Hyundai XG350 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 throttle position sensor fails, the engine's computer tends to overcompensate with fuel, leading black exhaust coming from the tailpipe. There is a strong possibility of engine misfires, and the check engine light will come on.

Throttle position sensors can also develop "dead spots," or certain places along the throttle curve where it doesn't get a reading. When this happens, the above symptoms can occur but then stop when you further press or let off the gas pedal.

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 Hyundai XG350

When troubleshooting cruise control issues in your Hyundai XG350, it's essential to adopt a methodical diagnostic approach. Begin by checking the cruise control fuse located in the fuse box, as a blown fuse is a straightforward fix that can often resolve the problem. Next, inspect the cruise control buttons on the steering wheel for any signs of damage or sticking, as these can hinder the system's engagement. If these initial checks do not reveal the issue, proceed to verify the functionality of the speed sensor, which is critical for the cruise control system's operation. Additionally, examine the vacuum lines connected to the cruise control module for any leaks or damage, as these can also disrupt the system. If the problem persists, using an OBD-II scanner to check for error codes can provide valuable insights into specific issues affecting the cruise control. Should you still be unable to identify the problem, consulting a qualified mechanic or a Hyundai dealership is advisable to ensure a thorough diagnosis and repair. By following this structured approach, you can effectively troubleshoot and potentially resolve cruise control issues in your Hyundai XG350.

What Could Cause the Cruise Control to Malfunction in a Hyundai XG350?

When diagnosing cruise control malfunctions in a Hyundai XG350, it's essential to consider several common problems that could be affecting the system's performance. A failed control module, sensor, or switch is often at the root of the issue, as these components are critical for the cruise control's operation. Additionally, throttle actuation problems, particularly those stemming from a faulty throttle position sensor, can lead to erratic engine behavior, such as excessive fuel consumption and black exhaust. It's also important to check for blown fuses within the cruise control system, as these can interrupt the necessary power supply. The brake pedal sensor plays a vital role in cruise control functionality; if it malfunctions, it may prevent the system from engaging or cause it to disengage unexpectedly. Furthermore, error codes like P0564 can indicate deeper issues with the cruise control switch, wiring, or the vehicle's powertrain control module. Lastly, ensure that the brake lights are functioning correctly, as faulty lights can mislead the control module into thinking the brake pedal is being pressed, thereby disabling the cruise control. By systematically addressing these potential issues, you can effectively troubleshoot and resolve cruise control problems in your Hyundai XG350.

Why is the Cruise Control Not Working in a Hyundai XG350?

When the cruise control in your Hyundai XG350 fails to operate, it’s crucial to address the issue without delay. Ignoring the malfunction can lead to unsafe driving conditions, as cruise control is designed to maintain a steady speed, allowing for a more relaxed driving experience. Common culprits behind this failure include a blown fuse, a defective brake pedal switch, or issues within the throttle control system. Additionally, problems with the ABS or even external factors like incompatible LED tail light bulbs can disrupt the cruise control functionality. Neglecting these symptoms not only compromises your driving safety but can also lead to more significant mechanical issues down the line, resulting in costly repairs. Therefore, it’s advisable to conduct a thorough inspection of the cruise control system and seek professional assistance if necessary to ensure your vehicle remains safe and reliable on the road.

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