2018 INFINITI Q70 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2018 INFINITI Q70 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 2018 INFINITI Q70 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 2018 INFINITI Q70 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 steps to diagnose the cruise control issue in a 2018 INFINITI Q70?

When diagnosing a cruise control issue in a 2018 INFINITI Q70, it's crucial to follow a methodical diagnostic approach that prioritizes simpler checks before delving into more complex solutions. Begin by inspecting the cruise control fuse, as a blown fuse can easily disrupt the system's operation. Next, examine the cruise control buttons on the steering wheel to ensure they are functioning correctly and not stuck, as this can hinder engagement. Utilizing an OBD-II scanner to check for error codes can reveal any electronic issues affecting the cruise control system. It's also important to assess the speed sensors, which are essential for the system's functionality, and to test the brake pedal switch, as a faulty switch can deactivate cruise control unexpectedly. Additionally, inspect the wiring connections for any signs of wear or loose connections that could be contributing to the problem. If these preliminary steps do not resolve the issue, seeking assistance from a professional mechanic with experience in INFINITI vehicles is recommended for a comprehensive diagnosis and repair. By systematically addressing these areas, you can effectively troubleshoot and potentially resolve cruise control issues in your Q70.

What are the common problems that could cause the cruise control to stop working in a 2018 INFINITI Q70?

When dealing with a malfunctioning cruise control system in a 2018 INFINITI Q70, it's essential to understand the common problems that could be at play. One of the primary culprits is a faulty speed sensor, which can disrupt the system's ability to accurately gauge the vehicle's speed, preventing it from engaging or maintaining the desired speed. Additionally, issues with the brake light switch can lead to unexpected disengagement of the cruise control when the brake pedal is pressed, creating a frustrating driving experience. Another potential issue is a defective cruise control module, which may fail to respond to user commands or maintain speed effectively. It's also worth checking for a blown fuse, as this can completely disable the cruise control system. Lastly, a malfunction in the throttle control system, such as a faulty throttle position sensor, can hinder the cruise control's ability to regulate speed. If you encounter any of these issues, it's advisable to consult a qualified mechanic for a thorough inspection and diagnosis to ensure your cruise control system is restored to proper working order.

How urgent is it to address the malfunctioning cruise control in a 2018 INFINITI Q70?

Addressing a malfunctioning cruise control system in a 2018 INFINITI Q70 is of utmost importance due to the potential safety risks it poses. A malfunction can lead to unexpected acceleration or deceleration, which significantly increases the likelihood of accidents on the road. Promptly fixing this issue not only safeguards your safety but also prevents the risk of causing harm to others. Additionally, neglecting the problem can result in further damage to the vehicle's components, leading to more extensive and costly repairs down the line. Beyond safety and financial implications, a malfunctioning cruise control detracts from the overall driving experience, making it inconvenient to use this feature when needed. Therefore, it is crucial to address any symptoms of malfunction as soon as they arise to ensure a safe and enjoyable driving experience.

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2018 INFINITI Q70 Cruise Control Not Working | RepairPal