2020 INFINITI Q50 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2020 INFINITI Q50 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 2020 INFINITI Q50 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 2020 INFINITI Q50 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.

What steps should I take to diagnose the cruise control issue in my 2020 INFINITI Q50?

To effectively diagnose the cruise control issue in your 2020 INFINITI Q50, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by examining the cruise control fuse, as a blown fuse can easily disrupt functionality. Next, inspect the cruise control buttons on the steering wheel for any signs of damage or debris that could hinder their operation. Utilizing an OBD-II scanner to check for error codes is a crucial step, as these codes can pinpoint specific problems within the system. Following this, assess the speed sensors, which are vital for the cruise control's performance, ensuring they are functioning correctly. Additionally, inspect the wiring connections associated with the cruise control system for any loose or damaged wires that may be causing the issue. If these preliminary checks do not resolve the problem, testing the cruise control module is essential to confirm it is sending the correct signals to the vehicle's computer. Should you find yourself unable to identify the issue after these steps, seeking assistance from a professional mechanic or an authorized INFINITI service center is advisable for a thorough diagnosis and repair. This methodical approach not only saves time but also enhances the likelihood of successfully resolving the cruise control malfunction.

What are the common problems that could cause the cruise control to stop working in a 2020 INFINITI Q50?

When the cruise control in your 2020 INFINITI Q50 stops functioning, it can be frustrating, but understanding the common problems can help you troubleshoot effectively. One of the primary culprits is a faulty brake light switch, which can mistakenly signal that the brakes are engaged, preventing the cruise control from activating. Additionally, a malfunctioning speed sensor may fail to provide accurate speed readings, disrupting the system's ability to maintain a steady pace. It's also worth checking for a blown fuse related to the cruise control system, as this can easily lead to a complete failure of the feature. Problems with the throttle control system, including issues with the throttle position sensor or throttle body, can further complicate matters by hindering the cruise control's speed maintenance capabilities. Lastly, if the Electronic Control Module (ECM) is experiencing issues, it may require diagnosis and repair to restore functionality. By systematically addressing these potential problems, you can enhance your chances of getting your cruise control back in working order.

How urgent is it to address the malfunctioning cruise control in a 2020 INFINITI Q50?

Addressing a malfunctioning cruise control in your 2020 INFINITI Q50 is not just a matter of convenience; it is a critical safety concern that requires immediate attention. When cruise control fails, it can lead to unexpected acceleration or deceleration, creating hazardous driving conditions that could result in accidents. Moreover, the comfort of your driving experience is compromised, as cruise control is designed to maintain a steady speed, allowing for a more relaxed journey. Additionally, a malfunctioning cruise control system may signal underlying issues with other vehicle components, which could further affect your car's performance. Therefore, it is essential to prioritize the repair of your cruise control system to ensure your safety, enhance your driving comfort, and maintain the overall functionality of your vehicle. Ignoring these symptoms could lead to more significant problems down the line, making timely intervention crucial.

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2020 INFINITI Q50 Cruise Control Issues & Repair Costs