2011 Lexus GS450h Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 2011 Lexus GS450h

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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 2011 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 2011 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 non-functioning cruise control in a 2011 Lexus GS450h?

When diagnosing the non-functioning cruise control in a 2011 Lexus GS450h, it's essential to adopt a systematic diagnostic approach that prioritizes simpler checks before delving into more complex issues. Begin by inspecting the cruise control fuse located in the vehicle's fuse box, as a blown fuse can often be the simplest explanation for the malfunction. Next, examine the cruise control buttons on the steering wheel to ensure they are operational and free from damage or obstruction. Following this, check the speed sensors, as they play a critical role in cruise control functionality; any dirt or damage here can disrupt the system. Utilizing an OBD-II scanner to scan for error codes can provide further insights into potential issues, guiding your next steps. Additionally, verify that the brake and clutch switches are functioning correctly, as these components are designed to disengage the cruise control when either pedal is pressed. A thorough inspection of the wiring and connections related to the cruise control system is also crucial, as damaged or loose connections can lead to failures. Finally, if all previous checks are clear, test the cruise control module itself to determine if it requires replacement. By following this structured approach, you can effectively identify the root cause of the cruise control issue and take appropriate action for repairs.

What are the common problems that could cause the cruise control to stop working in a 2011 Lexus GS450h?

When dealing with a malfunctioning cruise control system in a 2011 Lexus GS450h, it's crucial to understand the common problems that may be at play. One of the primary culprits could be a faulty cruise control switch, which may prevent the system from engaging or disengaging as intended. Additionally, a blown fuse can disrupt the electrical flow necessary for the cruise control to operate, making it a straightforward issue to check and replace. Another potential issue lies with the speed sensor; if this component is malfunctioning, it can hinder the cruise control's ability to maintain a consistent speed. Furthermore, vacuum leaks in the engine can significantly impact the performance of the cruise control system, as they can lead to inconsistent pressure levels. Lastly, a faulty brake light switch can cause the cruise control to disengage unexpectedly when the brakes are applied, which can be both frustrating and dangerous. By systematically diagnosing these common issues, DIYers can effectively troubleshoot and potentially resolve the cruise control problems in their Lexus GS450h.

How urgent is it to address the non-functioning cruise control in a 2011 Lexus GS450h?

When it comes to the non-functioning cruise control in a 2011 Lexus GS450h, the urgency of addressing this issue cannot be overstated. While it may not seem like an immediate emergency, neglecting this problem can lead to significant safety risks and potential damage to the vehicle's electronic systems. Cruise control is designed to enhance driving comfort and efficiency, particularly on long journeys, and its failure may indicate deeper issues within the car's electronic framework. This could affect not only the cruise control but also other critical systems, leading to more extensive repairs down the line. For DIY enthusiasts, it’s essential to recognize that while troubleshooting minor issues may be manageable, any signs of malfunction should prompt a thorough inspection. Ignoring the problem could result in inconvenient situations on the road, especially during highway driving where maintaining a consistent speed is crucial. Therefore, it is advisable to investigate the cause of the malfunction promptly, whether through self-diagnosis or by consulting a qualified mechanic, to ensure the vehicle remains safe and reliable.

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Troubleshooting 2011 Lexus GS450h Cruise Control Problems