2023 Lexus RC350 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2023 Lexus RC350 and How to Fix Them

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Reviewed by
Andrew Hajjar
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 2023 Lexus RC350 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 2023 Lexus RC350 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.

When the vehicle speed sensor fails or the wiring harness prevents signal transmission, the speedometer is the first thing that will stop functioning properly. This can be an intermittent issue where the speedometer only works occasionally, the speedometer may cease all function, or the speedometer may read erratically or incorrectly. Also, the traction control and anti lock brake warning lights specific to each vehicle may be illuminated, depending on the design of those systems. You may notice the vehicle hesitate to accelerate, cruise control will not function properly, and the vehicle may not shift properly through all of the gears.

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 steps should I take to diagnose the non-functioning cruise control in my 2023 Lexus RC350?

To diagnose the non-functioning cruise control in your 2023 Lexus RC350, begin with the simplest checks to save time and effort. Start by inspecting the cruise control fuse in the fuse box, as a blown fuse is a common culprit that can easily be replaced. Next, examine the cruise control buttons on your steering wheel for any signs of damage or sticking, as these can prevent the system from engaging. If these initial checks do not resolve the issue, proceed to verify the speed sensor's functionality, since a malfunction here can disrupt the cruise control operation. Utilizing an OBD-II scanner to scan for error codes can provide valuable insights into any underlying issues that may not be immediately visible. Additionally, check the brake and clutch switches, as faulty switches can inhibit the cruise control from activating. Finally, inspect the wiring and connections for any damage or looseness that could affect the system's performance. If these steps do not lead to a solution, it may be time to consult a professional mechanic or an authorized Lexus service center for further assistance. By following this structured approach, you can effectively diagnose and potentially resolve the cruise control issue in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2023 Lexus RC350?

When troubleshooting cruise control issues in a 2023 Lexus RC350, it's essential to understand the common problems that may lead to its malfunction. One frequent culprit is a faulty cruise control switch, which can hinder the system's ability to engage or disengage as intended. Additionally, a blown fuse within the cruise control circuit can disrupt its operation entirely. Speed sensor issues are another significant factor, as this component is crucial for maintaining a constant speed; any malfunction here can result in cruise control failure. Furthermore, a malfunctioning brake light switch can interfere with the system, as it is designed to deactivate cruise control when the brakes are applied. Problems with the throttle actuator, which regulates engine speed, can also impact the system's performance. Lastly, electrical issues, including wiring problems or a faulty control module, can affect the cruise control's functionality. If you encounter problems with your cruise control, it's advisable to conduct a thorough inspection or consult a qualified mechanic to accurately diagnose and resolve the issue.

How urgent is it to address the malfunctioning cruise control in my 2023 Lexus RC350?

When it comes to your 2023 Lexus RC350, addressing a malfunctioning cruise control system is not just a matter of convenience; it is a critical safety concern that requires immediate attention. A malfunction can lead to unexpected acceleration or deceleration, significantly increasing the risk of accidents on the road. Moreover, issues with the cruise control may signal deeper problems within the vehicle's electronic systems or sensors, which could compromise overall performance and safety. Ignoring these symptoms can also lead to higher fuel consumption and may cause damage to other vehicle components, resulting in more extensive and costly repairs down the line. Therefore, it is essential to prioritize the diagnosis and repair of your cruise control system to ensure your safety, maintain your vehicle's performance, and avoid unnecessary expenses in the future.

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