2023 Lexus RC F Cruise Control Isn't Working

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

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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 2023 Lexus RC F 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 RC F 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 cruise control issue in my 2023 Lexus RC F?

To effectively diagnose the cruise control issue in your 2023 Lexus RC F, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the cruise control fuse in the fuse box, as a blown fuse is a common and easily fixable problem that can disrupt functionality. Next, examine the cruise control buttons on your steering wheel to ensure they are operational, as malfunctioning buttons can prevent the system from engaging. Following this, verify the speed sensor's performance, since it is essential for maintaining the set speed. Utilizing an OBD-II scanner to check for error codes can provide valuable insights into any underlying issues. Additionally, inspect the brake lights, as faulty lights can interfere with cruise control operation. If these preliminary checks do not resolve the issue, assess the throttle position sensor for faults, as it plays a critical role in communication with the cruise control system. Finally, if all else fails, testing the cruise control module may be necessary, as it is the component that controls the entire system. By following this structured diagnostic approach, you can efficiently identify and address the root cause of the cruise control problem in your vehicle.

What are the common problems that could cause the cruise control to malfunction in a 2023 Lexus RC F?

When troubleshooting cruise control malfunctions in a 2023 Lexus RC F, it's essential to be aware of several common problems that may arise. One significant issue is faulty speed sensors, which can hinder the system's ability to maintain the desired speed accurately. Additionally, a malfunctioning brake light switch can lead to unexpected disengagement of the cruise control, even when the brakes are not applied. Throttle control issues can also impact the system's performance, preventing it from sustaining a constant speed. Furthermore, electrical problems, such as blown fuses or wiring faults, can disrupt the functionality of the cruise control system. Lastly, vacuum leaks in the engine can adversely affect the system's performance by compromising the engine's ability to maintain a steady speed. By understanding these potential issues, DIYers can better diagnose and address cruise control problems, ensuring a reliable driving experience.

How urgent is it to address the malfunctioning cruise control in a 2023 Lexus RC F?

When it comes to a malfunctioning cruise control in a 2023 Lexus RC F, the urgency of addressing 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 others on the road. Moreover, neglecting this problem can result in increased fuel consumption, as the system may not operate efficiently, leading to higher running costs. Additionally, a malfunctioning cruise control can cause strain on other vehicle components, potentially leading to more extensive and costly repairs down the line. Therefore, it is crucial to take immediate action by either troubleshooting the issue yourself or seeking professional assistance to ensure the vehicle remains safe and performs optimally. Prioritizing the repair of your cruise control system not only enhances your driving experience but also safeguards your vehicle's overall integrity.

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2023 Lexus RC F Cruise Control Issues & Repair Costs