2019 INFINITI Q70L Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 2019 INFINITI Q70L

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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 Q70L 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 Q70L 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.

What are the initial diagnostic steps to troubleshoot the non-functioning cruise control in a 2019 INFINITI Q70L?

When troubleshooting the non-functioning cruise control in your 2019 INFINITI Q70L, it's essential to adopt a systematic diagnostic approach. Begin by checking the cruise control fuse located in the vehicle's fuse box, as a blown fuse can often be the simplest explanation for the issue. Next, inspect the cruise control buttons on the steering wheel to ensure they are not stuck or damaged, as this can prevent the system from engaging. The vehicle speed sensor is another critical component; verify its functionality since the cruise control system relies on accurate speed readings to operate correctly. Utilizing a diagnostic scanner to check for any error codes can provide valuable insights into underlying issues. Additionally, ensure that your brake lights are functioning properly, as a faulty brake light switch can inadvertently disable the cruise control. Finally, take a moment to examine 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 issue in your INFINITI Q70L, empowering you to tackle the problem with confidence.

What are the common problems that could cause the cruise control to stop working in a 2019 INFINITI Q70L?

When the cruise control in your 2019 INFINITI Q70L 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 malfunctioning throttle actuator, which controls the engine's throttle and is essential for maintaining speed. Electrical problems, such as faulty wiring or blown fuses, can also interfere with the cruise control's operation. Lastly, vacuum leaks in the engine can affect the necessary vacuum pressure for the cruise control system to function properly. By identifying these common problems, you can take the first steps toward diagnosing and potentially fixing the cruise control issue in your vehicle.

How urgent is it to address the non-functioning cruise control in a 2019 INFINITI Q70L?

When it comes to the non-functioning cruise control in a 2019 INFINITI Q70L, understanding the urgency of the situation is crucial for both safety and vehicle performance. While it may seem like a minor inconvenience, a malfunctioning cruise control system can signal deeper electronic issues that, if left unchecked, could escalate into more significant problems. For DIY enthusiasts, it’s essential to recognize that this feature not only enhances driving comfort by reducing fatigue on long trips but also plays a role in maintaining optimal fuel efficiency. Ignoring the symptoms could lead to further complications, potentially affecting other systems in the vehicle. Therefore, addressing the issue promptly is advisable, as it can prevent frustration during highway driving and ensure that your vehicle operates safely and efficiently. If you're considering a DIY approach, be prepared to investigate the underlying causes, such as faulty sensors or electrical connections, and consult your vehicle's manual for guidance on troubleshooting and repairs.

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2019 INFINITI Q70L Cruise Control Issues & Repair Guide