2015 Smart Fortwo Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2015 Smart Fortwo and How to Fix Them

Find Repair Location
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 2015 Smart Fortwo 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 2015 Smart Fortwo 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-functional cruise control in a 2015 Smart Fortwo?

When faced with a non-functional cruise control in a 2015 Smart Fortwo, it's crucial to adopt a systematic diagnostic approach. Start by checking the cruise control fuse, as a blown fuse is a common and easily fixable issue that can halt the system's operation. Next, verify the functionality of the cruise control switch; a malfunctioning switch can prevent the system from engaging, so ensure it is in good working order. Following this, inspect the speed sensors, as they play a vital role in the cruise control system's performance; any faults here can lead to significant issues. Additionally, examine the wiring connections associated with the cruise control system for any signs of damage or loose connections, as these can disrupt signal transmission. Finally, using a diagnostic scanner to check for error codes can provide valuable insights into specific problems affecting the cruise control system. By methodically following these steps, you can effectively troubleshoot and potentially resolve the cruise control issues in your Smart Fortwo.

What are the common problems that could cause the cruise control to stop working in a 2015 Smart Fortwo?

When dealing with a malfunctioning cruise control system in a 2015 Smart Fortwo, it's essential to understand the common problems that may be at play. One frequent issue is a faulty speed sensor, which can hinder the system's ability to accurately gauge the vehicle's speed, preventing it from engaging or maintaining the desired speed. Additionally, a blown fuse can disrupt the electrical flow necessary for the cruise control to function, leading to complete failure. Another potential culprit is the brake light switch; if this component is malfunctioning, it may cause the cruise control to disengage unexpectedly or fail to engage at all. Furthermore, problems with the throttle actuator, which regulates engine speed, can also impact the cruise control's performance. Lastly, a defective cruise control module can result in the system not responding to user commands or failing to maintain speed. If you experience issues with your cruise control, it's advisable to consult a qualified mechanic who can accurately diagnose and resolve the specific problem.

How urgent is it to address the non-functioning cruise control in a 2015 Smart Fortwo?

When it comes to the non-functioning cruise control in a 2015 Smart Fortwo, the urgency of addressing this issue cannot be overstated. While it may seem like a minor inconvenience, neglecting this problem can lead to significant safety risks and potential damage to the vehicle's electronic systems. Cruise control is designed to enhance driving comfort and efficiency, particularly during long trips, and its failure may indicate deeper issues within the vehicle's electronics or sensors. This could compromise not only the cruise control system but also other critical functions, making it essential to investigate the root cause promptly. For DIY enthusiasts, understanding the implications of a malfunctioning cruise control system is crucial; it’s not just about fixing a feature but ensuring the overall health of the vehicle. By addressing the issue early, you can avoid more extensive repairs and maintain the safety and performance of your Smart Fortwo, making it a wise decision to tackle this problem sooner rather than later.

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.