2007 Lexus GS450h Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2007 Lexus GS450h

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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 2007 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 2007 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 2007 Lexus GS450h?

To effectively diagnose a cruise control issue in a 2007 Lexus GS450h, it's essential to adopt a systematic approach that begins with the simplest potential problems before progressing to more complex diagnostics. Start by checking the cruise control fuse, as a blown fuse can easily disrupt the system's functionality. Next, inspect the cruise control switch located on the steering wheel; a malfunctioning switch can often be the culprit behind cruise control failures. Utilizing an OBD-II scanner to scan for error codes is a crucial step, as these codes can reveal specific issues within the cruise control system. Additionally, ensure that the speed sensors are operating correctly, since they are vital for the cruise control's performance. It's also important to examine the wiring and connections for any signs of damage or corrosion, as poor connections can lead to operational failures. Finally, testing the cruise control module will help confirm whether it is functioning properly. By following this structured diagnostic approach, you can efficiently identify and address the root cause of the cruise control issue in your Lexus GS450h.

What are the common problems that could cause the cruise control to stop working in a 2007 Lexus GS450h?

When dealing with a malfunctioning cruise control system in a 2007 Lexus GS450h, it's crucial to understand the common problems that may be at play. One of the first areas to check is the cruise control switch, as a faulty switch can prevent the system from engaging. Additionally, inspect the fuses related to the cruise control; a blown fuse can easily disrupt functionality. The speed sensor is another critical component; if it’s malfunctioning, it can lead to erratic behavior or complete failure of the cruise control. Furthermore, the brake light switch should be examined, as a defective switch can cause the cruise control to disengage unexpectedly. Issues with the throttle actuator can also hinder the system's ability to maintain speed, while vacuum leaks may compromise overall performance. By systematically diagnosing these components, you can identify the root cause of the cruise control issue and take the necessary steps to resolve it.

How urgent is it to address the malfunctioning cruise control in a 2007 Lexus GS450h?

Addressing a malfunctioning cruise control system in a 2007 Lexus GS450h is of utmost urgency due to the significant safety risks it poses. A malfunction can lead to unexpected acceleration or deceleration, which can endanger not only the driver but also other road users. Additionally, a faulty cruise control system can create discomfort and frustration during driving, detracting from the overall experience. Ignoring these symptoms may result in more severe issues down the line, potentially leading to costly repairs that could have been avoided with prompt attention. Therefore, it is crucial for owners to prioritize the diagnosis and repair of cruise control problems to ensure both safety and the longevity of their vehicle.

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