2014 Lexus IS250 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2014 Lexus IS250 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 2014 Lexus IS250 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 2014 Lexus IS250 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 are the steps to diagnose the non-functioning cruise control in a 2014 Lexus IS250?

When diagnosing the non-functioning cruise control in a 2014 Lexus IS250, it's essential to adopt a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by inspecting the cruise control fuse located in the fuse box, as a blown fuse is a common and easily rectifiable issue. Next, examine the cruise control buttons on the steering wheel for any signs of damage or sticking, as these can hinder the system's engagement. Following this, verify the functionality of the speed sensor, since a malfunction here can disrupt the cruise control's operation. It's also crucial to check the brake pedal switch, which is responsible for disengaging the cruise control when the brakes are applied; a faulty switch can lead to persistent issues. To further narrow down potential problems, utilize an OBD-II scanner to identify any error codes that may indicate specific faults within the cruise control system. Finally, inspect the cruise control module for any damage or corrosion, as a malfunctioning module can be the root cause of the problem. By following this structured diagnostic approach, you can effectively identify and address the issues affecting your vehicle's cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2014 Lexus IS250?

When the cruise control in your 2014 Lexus IS250 stops functioning, it can be frustrating, but understanding the common problems can help you troubleshoot effectively. One of the first things to check is the cruise control switch; if it's faulty, it may not engage or disengage as intended. Additionally, inspect the fuses related to the cruise control system, as a blown fuse can completely disable its operation. The speed sensor is another critical component; if it malfunctions, the cruise control may struggle to maintain a consistent speed. Pay attention to the brake light switch as well, since a malfunction here can cause the system to disengage unexpectedly when you apply the brakes. Furthermore, issues with the throttle actuator can hinder the cruise control's ability to adjust the engine's throttle, impacting performance. Lastly, consider any electrical problems, such as wiring issues or a faulty control module, which can disrupt the entire cruise control system. By systematically checking these components, you can identify and resolve the issues affecting your cruise control, making your DIY repair efforts more successful.

How urgent is it to address the non-functioning cruise control in a 2014 Lexus IS250?

When it comes to a non-functioning cruise control in a 2014 Lexus IS250, addressing the issue promptly is essential for maintaining the vehicle's overall performance and safety. While the absence of cruise control may not seem like an immediate threat to drivability, it can lead to increased driver fatigue during long trips, as the driver must constantly monitor and adjust their speed. Moreover, neglecting this problem could result in more significant issues within the vehicle's electrical system, potentially affecting other components linked to the cruise control. For DIY enthusiasts, it’s advisable to start by checking the fuse and inspecting the cruise control switch for any visible damage. If these initial checks do not resolve the issue, consulting a professional mechanic is recommended to prevent further complications. By taking these steps, you can ensure that your Lexus remains safe and functional, allowing you to enjoy the convenience of cruise control on your journeys.

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