2016 Lexus IS350 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2016 Lexus IS350 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 2016 Lexus IS350 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 2016 Lexus IS350 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 initial diagnostic steps to troubleshoot the non-functioning cruise control in a 2016 Lexus IS350?

When troubleshooting the non-functioning cruise control in a 2016 Lexus IS350, start with the simplest checks to potentially resolve the issue quickly. Begin by inspecting the cruise control fuse; a blown fuse is a common culprit that can easily be replaced. Next, verify the functionality of the cruise control switch, as a malfunctioning switch can prevent the system from engaging. Following this, check the speed sensors, which are crucial for the cruise control to operate correctly; if they are faulty, they may need replacement. Additionally, using a diagnostic scanner to scan for error codes can provide insights into specific problems affecting the cruise control system. Lastly, ensure that the brake lights are functioning properly, as any issues here can disrupt the cruise control's operation. By systematically addressing these areas, you can effectively diagnose and potentially resolve the cruise control malfunction in your Lexus IS350.

What are the common problems that could cause the cruise control to stop working in a 2016 Lexus IS350?

When dealing with a malfunctioning cruise control system in a 2016 Lexus IS350, it's essential to understand the common problems that could be at play. One frequent issue is a faulty cruise control switch, which can hinder the system's ability to engage or disengage as intended. Additionally, a blown fuse may disrupt the electrical flow necessary for the cruise control to operate, leading to complete failure. Another critical component is the speed sensor; if it malfunctions, the system cannot maintain a constant speed, resulting in erratic behavior. The brake light switch also plays a vital role; if it fails, the cruise control may disengage unexpectedly when the brakes are applied. Furthermore, issues with the throttle actuator can prevent the system from maintaining the desired speed, while problems with the Electronic Control Module (ECM) can affect various vehicle functions, including cruise control. By identifying and addressing these common issues, you can effectively troubleshoot and potentially restore the cruise control functionality in your Lexus IS350.

How urgent is it to address the malfunctioning cruise control in my 2016 Lexus IS350?

Addressing the malfunctioning cruise control in your 2016 Lexus IS350 is of utmost importance due to the safety risks it poses. A malfunction can lead to unexpected acceleration or deceleration, which can create hazardous driving conditions and increase the likelihood of accidents. Additionally, a faulty cruise control system can detract from the overall driving experience, making long trips less enjoyable and more stressful. Ignoring these symptoms not only compromises your safety but can also lead to increased fuel consumption as the vehicle struggles to maintain a consistent speed. Furthermore, delaying repairs may result in more extensive damage to the vehicle's systems, ultimately leading to higher repair costs. Therefore, it is crucial to have the issue diagnosed and repaired by a qualified mechanic as soon as possible to ensure your safety and the optimal performance of your vehicle.

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