2006 Lexus GX470 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2006 Lexus GX470 and How to Fix Them

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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 2006 Lexus GX470 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 2006 Lexus GX470 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 2006 Lexus GX470?

When diagnosing a cruise control issue in a 2006 Lexus GX470, it's crucial to follow a methodical 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 is a common and easily fixable problem that can disrupt the system's functionality. Next, assess the cruise control buttons on the steering wheel to ensure they are working correctly, since any malfunction here can prevent the cruise control from engaging. After that, verify the speed sensor, which is vital for the cruise control's operation; a faulty sensor can lead to significant performance issues. Additionally, check the vacuum lines for any signs of leaks or damage, particularly in systems that depend on vacuum pressure. Utilizing an OBD-II scanner to read any error codes can also provide valuable insights into potential issues affecting the cruise control system. If these preliminary checks do not resolve the problem, consider testing the cruise control module, as it may require professional evaluation. By systematically following these steps, you can effectively diagnose and potentially resolve the cruise control issue in your Lexus GX470.

What are the common problems that could cause the cruise control to stop working in a 2006 Lexus GX470?

When dealing with a non-functional cruise control system in a 2006 Lexus GX470, it's essential to understand the common problems that could be at play. One of the primary culprits is a faulty brake light switch, which can prevent the cruise control from engaging if it fails to signal that the brake pedal is pressed. Additionally, a defective cruise control module may hinder the system's ability to operate correctly, leading to complete disengagement. Another issue to consider is vacuum leaks within the cruise control system, as these can disrupt its functionality and cause it to malfunction. Furthermore, a faulty speed sensor can impede the system's ability to maintain a constant speed, resulting in cruise control failure. Lastly, electrical issues, such as blown fuses or wiring problems, can also contribute to the cruise control not working as intended. By identifying and addressing these common issues, DIYers can effectively troubleshoot and restore the cruise control system to its proper functioning state.

How urgent is it to address the non-functioning cruise control in a 2006 Lexus GX470?

When it comes to the non-functioning cruise control in a 2006 Lexus GX470, understanding the urgency of the repair is crucial for maintaining both safety and vehicle performance. While the absence of cruise control may not present an immediate danger like malfunctioning brakes or steering, it can still lead to driver fatigue during long trips and negatively impact fuel efficiency. Ignoring this issue could result in more significant problems down the line, particularly if the underlying cause is related to the vehicle's electrical system, which could affect other critical components. Therefore, while it may not be the top priority compared to other mechanical issues, addressing the cruise control malfunction promptly is advisable to ensure the vehicle remains reliable and convenient for everyday use. Taking action sooner rather than later can help prevent further complications and enhance your overall driving experience.

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