Lexus GS460 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Lexus GS460 and How to Fix Them

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Reviewed by
Aisha
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
0%
25% chance it's the
Control Module
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a Lexus GS460 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 Lexus GS460 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.

Troubleshooting Cruise Control Issues in a Lexus GS460

When troubleshooting cruise control issues in your Lexus GS460, it's essential to adopt a systematic diagnostic approach. Start by checking the control module, sensors, and throttle, as these components are often the root of the problem. Next, test the brake switch by engaging the cruise control while holding the brake pedal up; if it activates, the brake switch may need adjustment. If these initial checks do not resolve the issue, inspect the wiring and connectors at the cruise control box, as loose or damaged connections can disrupt functionality. Additionally, ensure that there are no blown fuses or faulty brake lights, as these can also prevent the cruise control from operating correctly. By following this structured method, you can efficiently identify and address the underlying causes of cruise control malfunctions in your vehicle.

What Could Cause the Cruise Control to Malfunction in a Lexus GS460?

When dealing with cruise control malfunctions in a Lexus GS460, it's essential to understand the common problems that may arise. Mechanical issues, such as a damaged cable or a faulty vacuum actuator, can disrupt the functionality of the cruise control system, leading to erratic behavior or complete failure. Additionally, electrical problems, including faulty sensors or a malfunctioning control module, can prevent the system from engaging or maintaining speed. Another critical area to consider is the engine control unit (ECU); if this module is not functioning correctly, it can significantly impact the cruise control's performance. By diagnosing these potential issues, DIY enthusiasts can effectively troubleshoot and address the underlying causes of cruise control malfunctions, ensuring a smoother driving experience.

Why is the Cruise Control Not Working in a Lexus GS460?

When the cruise control in your Lexus GS460 is not functioning, it’s crucial to address the issue without delay. Ignoring symptoms such as unresponsive controls or sudden disengagement can lead to unsafe driving conditions, particularly on long trips where maintaining speed is essential. Mechanical issues, like a damaged cable or a blown fuse, can escalate if not resolved, potentially leading to more extensive repairs and increased costs. Additionally, a defective brake pedal switch can inadvertently disable the cruise control, posing a risk if you rely on this feature for convenience. Furthermore, if the engine control unit (ECU) or related modules are malfunctioning, neglecting these problems could result in significant engine performance issues. Lastly, faulty brake lights, which can affect the cruise control system, should not be overlooked, as they are vital for safe driving. Therefore, it is advisable to troubleshoot these issues promptly, either through DIY methods or by consulting a professional mechanic, to ensure your vehicle remains safe and reliable on the road.

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