2012 Smart Fortwo Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2012 Smart Fortwo 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 2012 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 2012 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 2012 Smart Fortwo?

When faced with a non-functional cruise control in your 2012 Smart Fortwo, it's essential to adopt a methodical diagnostic approach to identify the issue effectively. Start by checking the cruise control fuse, as a blown fuse is a straightforward fix that can often resolve the problem. Next, inspect the cruise control switch to ensure it is operating correctly; a malfunctioning switch can prevent the system from engaging. It's also crucial to verify the brake pedal switch, since a faulty switch can disable the cruise control for safety reasons. Additionally, examine the vehicle speed sensor, as any faults here can hinder the cruise control's ability to maintain speed. Finally, don't overlook the importance of checking for error codes in the vehicle's onboard diagnostic system, as these codes can provide critical insights into underlying issues. By following these steps, you can systematically troubleshoot and potentially resolve the cruise control malfunction, making your driving experience safer and more enjoyable.

What are the common problems that could cause the cruise control to stop working in a 2012 Smart Fortwo?

When troubleshooting the cruise control system in a 2012 Smart Fortwo, it's essential to understand the common problems that could lead to its failure. One of the primary culprits is a faulty brake light switch, which can prevent the cruise control from engaging since the system is designed to disengage when the brake pedal is pressed. Additionally, a malfunctioning speed sensor can disrupt the system's ability to maintain a set speed, leading to erratic performance. It's also wise to check for a blown fuse, as this can completely disable the cruise control functionality. Another potential issue is a malfunctioning throttle actuator, which may hinder the system's ability to adjust the vehicle's speed accurately. Lastly, a defective cruise control module could be the root cause of the problem, necessitating replacement to restore proper operation. By systematically addressing these common issues, you can effectively troubleshoot and potentially resolve the cruise control malfunction in your vehicle.

How urgent is it to address the malfunctioning cruise control in a 2012 Smart Fortwo?

Addressing a malfunctioning cruise control system in a 2012 Smart Fortwo is of utmost importance due to the potential safety risks it poses. A faulty cruise control can lead to unexpected acceleration or deceleration, which can create hazardous driving conditions. For DIY enthusiasts, understanding the urgency of this issue is crucial; neglecting it not only compromises your safety but can also lead to more severe vehicle damage over time. If the cruise control system is not repaired promptly, it may result in costly repairs down the line, as other components could be affected by the malfunction. Therefore, it is essential to diagnose and fix the problem as soon as possible to ensure the vehicle operates efficiently and safely, allowing you to enjoy a reliable driving experience.

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