2022 Lexus RX450h Cruise Control Isn't Working

Troubleshooting Common Issues with Cruise Control in Your 2022 Lexus RX450h 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 2022 Lexus RX450h 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 2022 Lexus RX450h 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 initial diagnostic steps to take when the cruise control isn't working on a 2022 Lexus RX450h?

When faced with a malfunctioning cruise control system in your 2022 Lexus RX450h, it's essential to approach the diagnosis methodically. Begin by checking the cruise control fuse, as a blown fuse can easily disrupt the system's functionality. Next, inspect the cruise control buttons on the steering wheel to ensure they are responsive and not stuck, as this can also prevent proper operation. Following this, verify the speed sensor's functionality, since a faulty sensor can lead to cruise control issues. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying problems. Additionally, ensure that your brake lights are functioning correctly, as a malfunctioning brake light switch can interfere with cruise control engagement. Finally, inspect the wiring connections associated with the cruise control system for any loose or damaged wires that could be causing the malfunction. By systematically addressing these areas, you can effectively troubleshoot and potentially resolve the cruise control issue on your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2022 Lexus RX450h?

When the cruise control in a 2022 Lexus RX450h ceases to function, several common problems may be at play. One of the primary culprits is a faulty speed sensor, which is crucial for the system to maintain the desired speed accurately. If the speed sensor is malfunctioning, it can lead to erratic behavior or complete failure of the cruise control. Another frequent issue is a defective brake light switch; if this switch fails, it may cause the cruise control to disengage unexpectedly whenever the brake pedal is pressed, disrupting the driving experience. Additionally, problems with the throttle control system, such as a malfunctioning throttle position sensor, can hinder the cruise control's ability to maintain speed effectively. Electrical issues, including blown fuses or wiring problems, can also interfere with the cruise control's operation, leading to intermittent or total failure. Lastly, vacuum leaks in the engine can significantly impact the cruise control system's performance, as they affect the engine's ability to maintain a steady speed. For those looking to diagnose these issues, it is advisable to conduct a thorough inspection or consult a qualified mechanic to ensure proper repairs and restore the cruise control functionality.

How urgent is it to address the malfunctioning cruise control in a 2022 Lexus RX450h?

When it comes to a malfunctioning cruise control in a 2022 Lexus RX450h, the urgency to address the issue cannot be overstated. A faulty cruise control system can lead to unpredictable vehicle behavior, such as sudden acceleration or deceleration, which poses a significant safety risk to both the driver and other road users. Moreover, the convenience of using cruise control, especially during long drives, is compromised, making the driving experience less enjoyable and more stressful. Ignoring these symptoms may not only lead to a frustrating driving experience but can also result in increased fuel consumption and unnecessary wear on the vehicle's components, ultimately leading to more costly repairs down the line. By addressing the malfunction promptly, you can prevent further damage to the cruise control system and ensure that your vehicle operates smoothly and safely. Therefore, if you notice any issues with your cruise control, it is crucial to diagnose and repair the problem as soon as possible, either through DIY methods or by consulting a qualified technician.

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