2017 INFINITI Q50 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2017 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 2017 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 2017 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 are the initial diagnostic steps to take when the cruise control isn't working on a 2017 INFINITI Q50?

When your cruise control isn't functioning on a 2017 INFINITI Q50, it's essential to approach the problem methodically. Begin by checking the cruise control fuse, as a blown fuse can easily disrupt the system's operation. Next, inspect the cruise control buttons on the steering wheel to ensure they are responsive; sometimes, a simple button malfunction can be the culprit. It's also crucial to verify the speed sensor's functionality, as this component is vital for the cruise control to work correctly. If these initial checks don't reveal the issue, consider using a diagnostic scanner to look for any error codes that might indicate specific problems within the system. Additionally, ensure that your brake lights are functioning properly, as a faulty brake light switch can interfere with cruise control activation. Finally, take a moment to inspect the wiring and connections associated with the cruise control system for any signs of damage or corrosion. By following these steps, you can effectively diagnose and potentially resolve the cruise control issues on your INFINITI Q50 without needing professional assistance.

What are the common problems that could cause the cruise control to stop working in a 2017 INFINITI Q50?

When the cruise control in your 2017 INFINITI Q50 ceases to function, it can be frustrating, but understanding the common problems can help you diagnose the issue. One frequent culprit is a faulty brake light switch, which is crucial for the cruise control system as it disengages the cruise when the brake pedal is pressed. If this switch is malfunctioning, it may prevent the cruise control from engaging at all. Another potential issue is related to the speed sensor; if this component is not accurately relaying the vehicle's speed, the cruise control may fail to maintain a constant speed. Additionally, a blown fuse in the cruise control circuit can completely disable the system, making it essential to check the fuses if you encounter this problem. The throttle actuator, responsible for controlling engine speed, can also malfunction, leading to cruise control issues. Lastly, problems with the Electronic Control Module (ECM), which oversees various vehicle functions, can disrupt the cruise control operation. If you suspect any of these issues, a thorough inspection of these components can help you identify the root cause and potentially resolve the problem without needing professional assistance.

How urgent is it to address the malfunctioning cruise control in a 2017 INFINITI Q50?

Addressing a malfunctioning cruise control in a 2017 INFINITI Q50 is of utmost importance due to the significant safety risks it poses. A faulty system can lead to unexpected acceleration or deceleration, which can endanger not only the driver but also passengers and other road users. Additionally, the constant need for manual speed control can distract the driver, increasing fatigue and the likelihood of accidents. Ignoring these symptoms can also result in more severe damage to the vehicle's components, leading to costly repairs down the line. Therefore, it is crucial to prioritize the repair of the cruise control system to ensure safe driving conditions and to avoid further complications. Taking prompt action not only safeguards your vehicle but also enhances the overall driving experience.

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