2009 Lexus LS460 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2009 Lexus LS460 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 2009 Lexus LS460 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 2009 Lexus LS460 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 initial diagnostic steps to troubleshoot the non-functional cruise control in a 2009 Lexus LS460?

When faced with a non-functional cruise control in a 2009 Lexus LS460, it's crucial to adopt a systematic diagnostic approach. Start by checking the cruise control fuse in the fuse box; a blown fuse can often be the simplest explanation for the malfunction. Next, examine the cruise control switch for any signs of damage or wear, as a faulty switch can prevent the system from engaging. It's also important to inspect the brake pedal switch, since the cruise control is designed to disengage when the brake is applied; a stuck or malfunctioning switch can disrupt this function. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues that may not be immediately visible. Finally, ensure that the vehicle speed sensor is functioning correctly, as it is integral to the cruise control system's operation. By following these steps, you can effectively narrow down the potential causes of the cruise control failure and take appropriate action to resolve the issue.

What are the common problems that could cause the cruise control to stop working in a 2009 Lexus LS460?

When troubleshooting the cruise control system in a 2009 Lexus LS460, it's essential to understand the common problems that may lead to its failure. One of the primary culprits is a faulty brake pedal switch, which is crucial for disengaging the cruise control when the brake is applied. If this switch malfunctions, it can prevent the system from engaging properly. Additionally, issues with the speed sensor can disrupt the system's ability to maintain a constant speed, leading to erratic behavior or complete failure of the cruise control. Another potential issue is vacuum leaks within the cruise control system, which can significantly affect its operation. A defective cruise control module may also be responsible for the malfunction, as it is the central component that controls the system's functions. Lastly, electrical problems, such as blown fuses or damaged wiring, can hinder the cruise control's performance. By identifying and addressing these common issues, you can effectively troubleshoot and restore the functionality of the cruise control in your Lexus LS460.

How urgent is it to address the non-functioning cruise control in a 2009 Lexus LS460?

Addressing a non-functioning cruise control in a 2009 Lexus LS460 should be considered a priority, even if it may not seem immediately urgent. While the absence of this feature does not directly compromise the vehicle's drivability or safety, it can lead to increased driver fatigue during long trips and diminish fuel efficiency, which are significant concerns for any driver. Moreover, neglecting the cruise control issue could signal underlying problems within the vehicle's electronic systems, potentially leading to more severe and costly repairs down the line. Therefore, it is wise to consult a qualified mechanic to diagnose and repair the cruise control system promptly. This proactive approach not only restores the convenience of cruise control but also helps maintain the overall health of your vehicle, ensuring a safer and more enjoyable driving experience.

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