2012 Lexus GX460 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2012 Lexus GX460 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
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2012 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 2012 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 non-functioning cruise control in a 2012 Lexus GX460?

When diagnosing the non-functioning cruise control in a 2012 Lexus GX460, 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 culprit that can easily disrupt the system's functionality. Next, examine the cruise control buttons on the steering wheel for any signs of damage or sticking, as these can prevent the system from engaging properly. If these initial steps do not resolve the issue, proceed to verify the speed sensor's operation, since a malfunctioning sensor can significantly impact the cruise control's performance. Additionally, check the brake pedal switch, which is essential for disengaging the cruise control when the brakes are applied; a faulty switch can lead to system failure. If the problem persists, utilize a diagnostic scanner to check for any error codes that may point to specific issues within the cruise control system. Finally, assess the cruise control module to ensure it is receiving power and functioning correctly, as a defective module can be the underlying cause of the malfunction. By systematically following these steps, you can effectively diagnose and address the issues affecting your vehicle's cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2012 Lexus GX460?

When troubleshooting the cruise control system in a 2012 Lexus GX460, it's essential to consider several common issues that could be at play. One of the first components to check is the brake light switch, as a malfunction here can prevent the cruise control from engaging properly. If the brake pedal is not detected as being released, the system will not activate. Additionally, a defective speed sensor can disrupt the system's ability to maintain a constant speed, leading to erratic behavior or complete failure. It's also wise to inspect the fuses related to the cruise control system; a blown fuse can cut off power and render the system inoperable. Furthermore, vacuum leaks in the engine can affect the necessary vacuum pressure for the cruise control to function correctly, so checking for any leaks is crucial. Lastly, the cruise control module itself may be faulty, which can prevent the system from engaging or maintaining speed. By systematically examining these components, DIYers can identify and potentially resolve the issues affecting their cruise control system.

How urgent is it to address the non-functioning cruise control in a 2012 Lexus GX460?

When it comes to the non-functioning cruise control in your 2012 Lexus GX460, understanding the urgency of the situation is crucial for both safety and vehicle performance. While it may not seem like an immediate emergency, neglecting this issue can lead to more significant problems down the line. A malfunctioning cruise control system can indicate underlying electronic issues that, if left unaddressed, could affect other critical components of your vehicle. For those who frequently embark on long drives, the convenience of cruise control is invaluable, as it not only enhances comfort but also improves fuel efficiency. Therefore, it is advisable to investigate the cause of the malfunction sooner rather than later. By doing so, you can prevent potential inconveniences and ensure that your vehicle remains in optimal condition. If you're considering a DIY approach, start by checking the fuses and connections related to the cruise control system, as these are common culprits. However, for a thorough diagnosis and repair, consulting a qualified mechanic is recommended to ensure that any underlying issues are properly addressed.

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