2018 Lexus ES350 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2018 Lexus ES350 and How to Fix Them

Find Repair Location
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 2018 Lexus ES350 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 ES350 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 steps should I take to diagnose the non-functioning cruise control in my 2018 Lexus ES350?

To effectively diagnose the non-functioning cruise control in your 2018 Lexus ES350, 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 issue that can halt the system's operation. Next, examine the cruise control buttons on the steering wheel for any signs of damage or sticking, as these can prevent the system from engaging. Following this, verify the functionality of the speed sensor, since a malfunction here can disrupt the cruise control's performance. Utilizing an OBD-II scanner to check for error codes can provide valuable insights into any underlying issues affecting the system. Additionally, ensure that your brake lights are functioning correctly, as a faulty brake light switch can disable cruise control for safety reasons. Finally, if your vehicle's cruise control operates on a vacuum system, inspect the vacuum lines for leaks or damage, as these can lead to system failure. By following this structured diagnostic approach, you can efficiently identify and address the root cause of your cruise control issues.

What are the common problems that could cause the cruise control to stop working in a 2018 Lexus ES350?

When the cruise control in your 2018 Lexus ES350 stops functioning, there are several common problems you can troubleshoot on your own. Start by checking the brake pedal switch, as a faulty switch may not signal the system correctly when the brake is applied, preventing cruise control from engaging. Next, inspect the speed sensor, which is crucial for accurate speed readings; if it’s malfunctioning, it can cause the cruise control to disengage unexpectedly. Additionally, a blown fuse in the cruise control circuit can disrupt its operation, so examining the fuses is a good step. You should also consider the throttle actuator, as issues here can hinder the system's ability to maintain speed. Lastly, if you suspect more complex electronic issues, the Electronic Control Module (ECM) may be at fault, affecting various vehicle functions including cruise control. By systematically checking these components, you can identify the root cause of the problem and determine whether a simple fix is possible or if professional assistance is needed.

How urgent is it to address the non-functioning cruise control in my 2018 Lexus ES350?

When considering the urgency of fixing a non-functioning cruise control in your 2018 Lexus ES350, it is essential to recognize the implications of neglecting this issue. A malfunctioning cruise control system can compromise your safety, particularly during long drives where maintaining a consistent speed is crucial. The absence of this feature not only increases the risk of accidents but can also lead to driver fatigue, detracting from the overall comfort of your journey. Moreover, delaying repairs may result in further complications within your vehicle's electronic systems, potentially escalating repair costs and leading to more significant issues down the line. Therefore, while it may seem like a minor inconvenience, addressing the cruise control malfunction promptly is vital for ensuring a safe and enjoyable driving experience.

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 ES350 Cruise Control Issues & Repair Costs