2015 Lexus GX460 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2015 Lexus GX460 and How to Fix Them

Find Repair Location
Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
0%
25% chance it's the
Control Module
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2015 Lexus GX460 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 2015 Lexus GX460 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.

What are the steps to diagnose the cruise control issue in a 2015 Lexus GX460?

To effectively diagnose a cruise control issue in a 2015 Lexus GX460, it's essential to adopt a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by inspecting the cruise control fuse located in the fuse box, as a blown fuse can often be the root of the problem. Next, examine the cruise control buttons on the steering wheel to ensure they are operational and not stuck, as this can hinder functionality. Utilizing an OBD-II scanner to check for error codes can provide valuable insights into any underlying issues within the cruise control system. Additionally, inspect the speed sensors, which play a crucial role in the system's operation, and verify that the brake pedal switch is functioning correctly, as a malfunctioning switch can prevent the cruise control from engaging. Lastly, take a moment to examine the wiring connections associated with the cruise control system for any signs of damage or loose connections. If these preliminary checks do not resolve the issue, it may be time to consult a professional mechanic for a more thorough diagnosis and repair. By following this structured diagnostic approach, you can efficiently identify and address cruise control problems in your Lexus GX460.

What are the common problems that could cause the cruise control to stop working in a 2015 Lexus GX460?

When the cruise control in a 2015 Lexus GX460 ceases to function, several common problems may be at play. One of the primary culprits is a faulty cruise control switch, which can hinder the system's ability to engage or disengage as intended. Additionally, issues with the speed sensor can disrupt the system's capacity to maintain a consistent speed, leading to erratic performance. Another frequent issue is a malfunctioning brake light switch; if this switch fails, it may cause the cruise control to disengage unexpectedly whenever the brakes are applied. Furthermore, problems with the throttle actuator can prevent the cruise control from adjusting the throttle position correctly, impacting its overall functionality. Lastly, electrical problems such as wiring issues or blown fuses can also contribute to cruise control failure. By understanding these potential issues, DIYers can effectively troubleshoot and resolve cruise control problems in their Lexus GX460, restoring the convenience of this essential driving feature.

How urgent is it to repair the non-functioning cruise control on a 2015 Lexus GX460?

When evaluating the urgency of repairing the non-functioning cruise control on a 2015 Lexus GX460, it's essential to recognize that while this feature enhances driving convenience, its malfunction does not present an immediate safety threat. Drivers can still operate the vehicle safely without cruise control, making it more of a comfort issue than a critical safety concern. However, neglecting this repair could lead to complications if the underlying cause is related to broader electrical or mechanical issues within the vehicle. Addressing the cruise control problem promptly is advisable to maintain the vehicle's overall functionality and prevent potential future repairs that could arise from ignoring the symptoms. Therefore, while the urgency may not be high, timely attention to the issue is beneficial for the long-term health of your Lexus GX460.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.