2018 Lexus LX570 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2018 Lexus LX570 and How to Fix Them

Find Repair Location
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 2018 Lexus LX570 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 2018 Lexus LX570 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 troubleshoot the non-functioning cruise control in a 2018 Lexus LX570?

When troubleshooting the non-functioning cruise control in your 2018 Lexus LX570, it's essential to adopt a systematic diagnostic approach. Begin by checking the cruise control fuse, as a blown fuse can easily disrupt the system's operation. Next, inspect the cruise control buttons on the steering wheel to ensure they are responsive and not stuck, as malfunctioning buttons can prevent engagement. Following this, verify the functionality of the vehicle's speed sensor, which is crucial for the cruise control to maintain a set speed; a faulty sensor can lead to significant issues. Utilizing a diagnostic scanner to check for error codes can provide insights into any underlying problems that may not be immediately visible. Additionally, examine the brake and clutch switches, as these components must operate correctly for the cruise control to engage. Finally, inspect the wiring and connections associated with the cruise control system for any signs of damage or corrosion, as faulty wiring can severely impact performance. By methodically following these steps, you can effectively diagnose and potentially resolve the cruise control issue in your Lexus LX570. If the problem persists, seeking professional assistance may be necessary to ensure a thorough repair.

What are the common problems that could cause the cruise control to stop working in a 2018 Lexus LX570?

When dealing with a malfunctioning cruise control system in a 2018 Lexus LX570, it's essential to understand the common problems that may be at play. One frequent issue is a faulty brake pedal switch, which can disrupt the system's ability to engage or disengage properly. Additionally, speed sensor problems can lead to incorrect speed readings, further complicating the functionality of cruise control. A blown fuse is another simple yet often overlooked culprit that can prevent the system from operating as intended. Furthermore, a malfunctioning throttle actuator may hinder the cruise control's ability to maintain speed effectively. Lastly, issues with the Electronic Control Module (ECM) can interfere with communication between the cruise control system and other vehicle components, resulting in failure. If you experience any of these issues, it is advisable to consult a qualified mechanic for a thorough inspection and diagnosis to ensure your cruise control system is restored to proper working order.

How urgent is it to address the non-functioning cruise control in my 2018 Lexus LX570?

Addressing the non-functioning cruise control in your 2018 Lexus LX570 is of utmost importance due to the immediate safety risks it poses. A malfunctioning cruise control system can lead to erratic speed changes, which may increase the likelihood of accidents, especially during long highway drives where maintaining a steady speed is crucial. Additionally, the absence of this feature can significantly detract from your driving comfort, making long trips more tiring and less enjoyable. Beyond these immediate concerns, a faulty cruise control system may indicate deeper issues within your vehicle's electronic systems. By delaying repairs, you risk exacerbating these problems, potentially leading to more extensive and costly repairs down the line. Therefore, it is essential to prioritize the resolution of this issue to ensure both your safety and the overall health of your vehicle.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.

2018 Lexus LX570 Cruise Control Issues & Repair Costs