2010 Lexus GS450h Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2010 Lexus GS450h and How to Fix Them

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Reviewed by
Devin Cabugcal
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 2010 Lexus GS450h 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 2010 Lexus GS450h 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.

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 2010 Lexus GS450h?

To diagnose the cruise control issue in your 2010 Lexus GS450h, start with the basics by checking the cruise control fuse, as a blown fuse can easily disrupt functionality. Next, inspect the cruise control switch on the steering wheel to ensure it is operating correctly, since a faulty switch can lead to engagement problems. If these initial checks do not reveal the issue, utilize an OBD-II scanner to look for any error codes that may indicate specific malfunctions within the system. Additionally, verify the functionality of the vehicle's speed sensors, as they are essential for the cruise control to operate properly. It is also important to examine the wiring and connections associated with the cruise control system for any signs of damage or corrosion, as these can impede signal flow. Finally, test the cruise control module itself to confirm it is functioning as intended. By following this structured approach, you can effectively diagnose and address the cruise control issue in your Lexus, ensuring a smoother driving experience.

What are the common problems that could cause the cruise control to stop working in a 2010 Lexus GS450h?

When the cruise control in a 2010 Lexus GS450h ceases to function, several common problems may be at play. One of the primary culprits is a faulty brake light switch, which is crucial for the cruise control system as it disengages the system when the brake pedal is pressed. If this switch malfunctions, it can prevent the cruise control 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 engine, which can hinder the system's performance by affecting its ability to maintain speed. Furthermore, a defective cruise control module may also be responsible for the system's malfunction, as it is the central component that controls cruise functions. Lastly, electrical problems, such as blown fuses or wiring issues, can significantly impact the cruise control system's operation. By understanding these common problems, DIYers can effectively troubleshoot and potentially resolve the issues affecting their vehicle's cruise control system.

How urgent is it to address the non-functioning cruise control in a 2010 Lexus GS450h?

When it comes to a non-functioning cruise control in a 2010 Lexus GS450h, understanding the urgency of the situation is crucial for any DIY enthusiast. While the immediate impact on drivability may seem minimal, neglecting this issue can lead to more significant problems down the line. A malfunctioning cruise control system can indicate underlying electrical or mechanical faults that, if left unaddressed, could escalate into costly repairs. Moreover, the convenience of cruise control enhances driving comfort, especially on long trips, and its absence can lead to increased driver fatigue. Therefore, it is advisable to investigate the cause of the malfunction promptly. This could involve checking the fuses, inspecting the brake pedal switch, or examining the cruise control module. By taking these steps early, you not only ensure a more enjoyable driving experience but also safeguard against potential safety risks and further damage to your vehicle's systems.

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2010 Lexus GS450h Cruise Control Malfunctions & Solutions