Fiat 500 Cruise Control Isn't Working

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

Find Repair Location
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 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 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.

Troubleshooting Cruise Control Issues in a Fiat 500

When troubleshooting cruise control issues in your Fiat 500, start by checking the simplest components first. Begin with the cruise control switch and ensure it is functioning correctly; a faulty switch can prevent the system from engaging. Next, inspect the vehicle's fuses related to the cruise control system, as a blown fuse can disrupt functionality. If these initial checks do not resolve the issue, move on to examining the throttle position sensor, which is crucial for the cruise control to maintain speed. A malfunctioning sensor can lead to erratic behavior or complete failure of the system. Additionally, consider the wiring and connections associated with the cruise control system, as loose or damaged wires can cause intermittent problems. If the cruise control still does not operate as expected, it may be necessary to delve deeper into the control module or throttle body for potential faults. By following this structured approach, you can effectively diagnose and address the common issues that may be affecting your Fiat 500's cruise control system.

What Could Cause Cruise Control Malfunctions in a Fiat 500?

When diagnosing cruise control malfunctions in a Fiat 500, it's important to consider several common problems that could be affecting the system. One of the primary culprits is the throttle sensor, which can fail and require replacement, disrupting the cruise control's functionality. Additionally, poor electrical connections at the input or output speed sensors can lead to intermittent issues, making it crucial to inspect these connections for any signs of wear or corrosion. Another potential issue is a blown fuse within the cruise control system, which can cut off the necessary power supply. The brake pedal sensor also plays a vital role; if it malfunctions, it can prevent the cruise control from engaging properly. Furthermore, a faulty brake light or a defective brake switch can contribute to the problem, as these components are integral to the system's operation. Lastly, engine-related issues, including the presence of a check engine light, can inhibit cruise control functionality. By systematically addressing these common causes, DIYers can effectively troubleshoot and resolve cruise control malfunctions in their Fiat 500.

Why is the Cruise Control Not Working in a Fiat 500?

When your Fiat 500's cruise control system fails, it’s crucial to understand the urgency of the situation. Ignoring symptoms such as stuttering during uphill drives or inconsistent acceleration can not only compromise your driving experience but also pose significant safety risks. A malfunctioning cruise control can lead to unexpected speed changes, making it difficult to maintain control of the vehicle, especially in high-traffic situations. Additionally, if the issue stems from a faulty control module or sensor, delaying repairs could result in more extensive damage and costly repairs down the line. Therefore, it’s essential to diagnose and address the underlying problems promptly, whether they involve the cruise control knob, throttle actuation, or other components, to ensure your Fiat 500 remains safe and reliable on the road.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.