2019 INFINITI QX50 Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 2019 INFINITI QX50

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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 2019 INFINITI QX50 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 2019 INFINITI QX50 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 2019 INFINITI QX50?

To effectively diagnose the cruise control issue in your 2019 INFINITI QX50, begin with the simplest solutions before progressing to more complex diagnostics. Start by checking the cruise control fuse in the fuse box, as a blown fuse can often be the root of the problem. Next, inspect the cruise control buttons on your steering wheel to ensure they are functioning correctly, as faulty buttons can disrupt the system. After that, verify the speed sensor, which is crucial for maintaining a constant speed; if it’s malfunctioning, it can prevent the cruise control from working. Utilizing an OBD-II scanner to check for any error codes related to the cruise control system can provide valuable insights into the issue. Additionally, ensure that all brake lights are operational, as faulty brake lights can interfere with cruise control functionality. If your vehicle uses vacuum lines for the cruise control system, inspect these for any leaks or damage. If you’ve gone through these steps and still can’t identify the issue, it may be time to consult a mechanic or dealership for a professional diagnosis and repair. By following this structured approach, you can systematically address potential problems and restore your cruise control system to proper working order.

What are the common problems that could cause the cruise control to stop working in a 2019 INFINITI QX50?

When the cruise control in your 2019 INFINITI QX50 ceases to function, it can be frustrating, but understanding the common problems can help you diagnose the issue effectively. One of the primary culprits is a faulty speed sensor, which is crucial for the cruise control system to accurately gauge your vehicle's speed. If this sensor malfunctions, the system may fail to engage or maintain the desired speed. Another frequent issue arises from the brake light switch; if this switch is defective, it can inadvertently signal the cruise control to deactivate whenever the brakes are applied, disrupting its operation. Additionally, a blown fuse within the cruise control circuit can prevent the system from functioning altogether, making fuse replacement a simple yet effective solution. Problems with the throttle actuator can also hinder the cruise control's ability to maintain speed, as this component regulates the engine's throttle opening. Lastly, issues with the electronic control module (ECM), which oversees various vehicle functions, including cruise control, can lead to erratic behavior or complete failure of the system. By identifying these common problems, you can take the first steps toward troubleshooting and potentially restoring the cruise control functionality in your vehicle.

How urgent is it to address the non-functioning cruise control in a 2019 INFINITI QX50?

Addressing the non-functioning cruise control in a 2019 INFINITI QX50 is crucial for both safety and vehicle performance. When cruise control fails, it not only diminishes the convenience of maintaining a steady speed, which can lead to increased driver fatigue on long journeys, but it may also signal deeper issues within the vehicle's systems. Ignoring this malfunction could result in more significant problems down the line, potentially compromising the vehicle's overall safety and functionality. Moreover, a malfunctioning cruise control system can lead to erratic vehicle behavior, increasing the risk of accidents. Therefore, it is essential to diagnose and resolve any issues with the cruise control promptly, ensuring that your vehicle remains safe and efficient on the road. Taking action sooner rather than later can prevent further damage and enhance your driving experience.

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