2018 Fiat 500 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2018 Fiat 500 and How to Fix Them

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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 2018 Fiat 500 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 Fiat 500 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.

The cruise control switch can cause complete failure of the cruise control feature, but in a lucky scenario only partial functionality will be lost. This means that the cruise control may come on, but that it will not increase in speed automatically, or the cancel button does not work leading the driver to cancel cruise control with the foot brake. In some vehicles, the cruise control light may illuminate, or a warning message may be displayed due to lack of functionality.

What are the steps to diagnose the cruise control issue in a 2018 Fiat 500?

To effectively diagnose a cruise control issue in a 2018 Fiat 500, it's essential to adopt a systematic diagnostic approach that begins with the simplest solutions before progressing to more complex assessments. Start by checking the cruise control fuse, as a blown fuse is a common and easily fixable problem that can disrupt the system's functionality. Next, inspect the cruise control buttons on the steering wheel to ensure they are operational, as faulty buttons can lead to engagement issues. Utilizing a diagnostic scanner to check for error codes is a crucial step, as these codes can reveal specific malfunctions within the system. Following this, verify the speed sensors, which are vital for the cruise control's performance; any faults here can cause erratic behavior. Additionally, examine the wiring and connections for signs of damage or corrosion, as poor connections can significantly impact the system's operation. Finally, test the cruise control module itself to confirm it is functioning correctly, as a malfunctioning module can prevent the cruise control from engaging altogether. By following this structured approach, you can efficiently identify and address the root cause of the cruise control issue in your Fiat 500.

What are the common problems that could cause the cruise control to stop working in a 2018 Fiat 500?

When troubleshooting cruise control issues in a 2018 Fiat 500, it's essential to understand the common problems that may be at play. One frequent culprit is a faulty brake pedal switch, which is designed to disengage the cruise control when the brake is applied; if this switch malfunctions, it can prevent the system from engaging. Additionally, issues with the speed sensor can disrupt the cruise control's ability to maintain the desired speed, as it relies on accurate speed readings to function correctly. Another potential issue is a blown fuse within the cruise control system, which can easily be checked and replaced if necessary. Furthermore, the cruise control module itself may be defective, requiring repair or replacement to restore functionality. Lastly, electrical problems, such as damaged wiring or a weak battery, can also hinder the cruise control's operation. By systematically addressing these common issues, you can effectively troubleshoot and potentially resolve the cruise control problems in your Fiat 500.

How urgent is it to address the malfunctioning cruise control in a 2018 Fiat 500?

Addressing a malfunctioning cruise control in a 2018 Fiat 500 is of utmost urgency due to the significant safety risks it poses. A faulty system can lead to unexpected acceleration or deceleration, which can result in dangerous driving situations. Additionally, a malfunctioning cruise control can create discomfort for the driver, detracting from the overall driving experience and making long trips more taxing. Ignoring these symptoms not only compromises safety but can also lead to increased fuel consumption, as the vehicle struggles to maintain a consistent speed. Furthermore, delaying repairs may exacerbate the problem, potentially leading to more extensive damage to the vehicle's systems and higher repair costs down the line. Therefore, it is crucial to have the cruise control issue diagnosed and repaired promptly by a qualified mechanic to ensure both safety and vehicle efficiency.

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2018 Fiat 500 Cruise Control Issues & Repairs | RepairPal