2017 Lexus NX300h Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2017 Lexus NX300h and How to Fix Them

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Reviewed by
Aisha
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 2017 Lexus NX300h 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 2017 Lexus NX300h 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 2017 Lexus NX300h?

When troubleshooting the non-functioning cruise control in your 2017 Lexus NX300h, start with the simplest checks to avoid unnecessary complexity. Begin by inspecting the cruise control fuse; a blown fuse can easily disrupt the system's functionality. Next, examine the cruise control switch located on the steering wheel for any signs of damage or malfunction, as this is a common point of failure. It's also essential to verify the operation of the vehicle speed sensor, which is critical for cruise control to engage properly. Pay attention to any dashboard warning lights or error codes that may provide insight into underlying issues. Lastly, check the brake pedal switch, since the cruise control system is designed to disengage when the brakes are applied, and a faulty switch could prevent it from functioning. By systematically addressing these areas, you can effectively diagnose and potentially resolve the cruise control issue on your own.

What are the common problems that could cause the cruise control to stop working in a 2017 Lexus NX300h?

When the cruise control in your 2017 Lexus NX300h ceases to function, it can be frustrating, but understanding the common problems can help you troubleshoot effectively. One of the primary culprits is a faulty speed sensor, which is crucial for the cruise control system to accurately gauge the vehicle's speed. If this sensor malfunctions, the system may fail to engage or maintain the desired speed. Additionally, issues with the brake light switch can disrupt the cruise control, as this switch is designed to deactivate the system when the brakes are applied. Another potential issue is a blown fuse; checking the fuses related to the cruise control system can often reveal simple fixes. Furthermore, a malfunction in the throttle control system, such as a faulty throttle position sensor, can hinder the cruise control's ability to maintain speed. Lastly, electrical problems, including loose connections or wiring issues, can also lead to malfunctions. By systematically checking these components, you can identify and resolve the issues affecting your cruise control system, restoring its functionality and enhancing your driving experience.

How urgent is it to address the malfunctioning cruise control in my 2017 Lexus NX300h?

When it comes to the malfunctioning cruise control in your 2017 Lexus NX300h, the urgency of addressing the issue cannot be overstated. A malfunctioning system can lead to unexpected acceleration or deceleration, creating a significant safety hazard on the road. This unpredictability not only increases the risk of accidents but also contributes to driver distraction and fatigue, as you may find yourself constantly adjusting your speed manually. Furthermore, neglecting this issue can result in higher fuel consumption and potential damage to your vehicle's engine and other components, leading to costly repairs down the line. By promptly diagnosing and repairing the cruise control system, you not only enhance your safety but also ensure the overall performance and efficiency of your Lexus NX300h. Therefore, it is advisable to consult a qualified mechanic at the earliest opportunity to mitigate any risks associated with this malfunction.

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