2021 Tesla S Cruise Control Isn't Working

Fixing cruise control issues in your 2021 Tesla S

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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 2021 Tesla S 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.

What are the initial steps to diagnose the cruise control issue in a 2021 Tesla S?

When tackling a cruise control issue in your 2021 Tesla Model S, start by checking for any error messages displayed on the screen, as these can provide immediate insights into the problem. Next, ensure that the cruise control settings are properly configured; verify that the system is engaged and that the speed settings are appropriate. Testing other vehicle functions can help determine if the cruise control issue is isolated or part of a broader malfunction. Additionally, inspect the sensors and cameras associated with the cruise control system, as dirt or obstructions can hinder performance. Finally, consult the owner's manual for specific troubleshooting guidance tailored to your vehicle, which can offer valuable tips on common issues and their resolutions. By following these steps, you can systematically diagnose and potentially resolve the cruise control problem, making your DIY repair efforts more effective.

What are the common problems that could cause the cruise control to stop working in a 2021 Tesla S?

When dealing with cruise control issues in a 2021 Tesla Model S, it's essential to understand the common problems that may arise. One frequent culprit is a software glitch, which can disrupt the system's functionality and prevent it from operating correctly. Additionally, sensor issues can play a significant role; if the sensors responsible for detecting speed and distance are malfunctioning, the cruise control may fail to engage. Faulty wiring is another potential problem, as damaged connections can lead to interruptions in the system's operation. Furthermore, a malfunctioning brake light switch can hinder the cruise control from engaging, since the system is designed to deactivate when the brake pedal is pressed. Lastly, battery problems can also affect the cruise control's performance, as insufficient power supply may lead to system failures. If you experience any of these issues, it is advisable to consult a qualified technician for a thorough inspection and diagnosis.

How urgent is it to address the malfunctioning cruise control in a 2021 Tesla S?

Addressing a malfunctioning cruise control in a 2021 Tesla Model S is of utmost urgency due to the significant safety risks it poses. A malfunctioning system can lead to loss of control while driving, increasing the likelihood of accidents. Additionally, the inconvenience of an unreliable cruise control can detract from the overall driving experience, making long trips more stressful and less enjoyable. Ignoring these symptoms can also result in further damage to the vehicle's systems, leading to more extensive and costly repairs down the line. Therefore, it is crucial to act promptly by consulting the manufacturer's guidelines or reaching out to a certified Tesla service center. Timely maintenance not only ensures the proper functioning of the cruise control system but also helps maintain the vehicle's overall performance and safety on the road.

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