Modern vehicles come equipped with a variety of advanced features designed to enhance convenience, comfort, and efficiency. One such feature that has gained popularity in recent years is the autostart (or start-stop) system. This technology automatically shuts off the engine when the car is stationary and restarts it when the driver accelerates, improving fuel economy and reducing emissions. While beneficial in many situations, there are times when drivers may want to turn off autostart — whether for personal preference, driving conditions, or mechanical reasons.
In this article, we’ll provide a thorough, step-by-step guide on how to disable the autostart feature in different types of vehicles, discuss the reasons for turning it off, and cover important considerations to ensure safety and vehicle longevity.
Understanding Autostart Systems in Modern Vehicles
Before diving into how to disable autostart, it’s important to understand what it is and why manufacturers include it in their vehicles.
What Is Autostart (Start-Stop) Technology?
Autostart, also known as start-stop technology, is a fuel-saving system that temporarily turns off the engine when the car is stopped — such as at a traffic light or in heavy traffic — and then automatically restarts it when the driver is ready to move again (typically when releasing the brake or pressing the accelerator). This system helps reduce fuel consumption and minimize engine emissions, especially in city driving where frequent stops occur.
How Does Autostart Work?
The system uses an array of sensors and controls to determine when the engine can safely be shut down and restarted:
- Brake pedal position sensor – detects when the driver comes to a stop.
- Battery charge status – ensures there is enough power to restart the engine.
- A/C and heating demand – delays shutdown if the cabin climate isn’t at the desired setting.
- Engine temperature – ensures proper engine warm-up before engaging.
When all conditions are met, the engine stops, and a small electric motor or enhanced starter quickly restarts it when needed.
Why Would You Want to Turn Off Autostart?
While autostart has its advantages, it may not always be desirable. Here are common reasons drivers consider turning it off:
Comfort and Personal Preference
Some drivers find the sudden engine stop and restart jarring or uncomfortable. The slight delay in restarting the engine may create a less smooth experience, especially when moving in heavy city traffic.
Driving Conditions
In environments like steep hills, highway interchanges, or heavy winds, the autostart function may cut the engine at inconvenient times, potentially causing hesitation or danger during reacceleration.
Vehicle Systems Demands
Advanced systems like turbochargers and transmission fluid warm-up may not function optimally if the engine is frequently stopped and restarted. Prolonged use under certain conditions may increase wear on components.
Personal Driving Style
Aggressive drivers or those who enjoy a dynamic driving experience may prefer to maintain engine responsiveness and avoid interruptions caused by autostart.
How to Turn Off Autostart: Step-by-Step Guides
While methods can vary significantly across makes and models, there are several general ways to disable or bypass autostart. We’ll explore the most common methods here.
1. Using the Autostart Disable Button (Most Common)
Many modern cars equipped with an automatic start-stop system come with a manual button or switch to disable the feature temporarily.
Steps to Turn Off Autostart Using a Button:
- Press the autostart disable button – it often displays a capital “A” with a line through it.
- Check the dashboard – most vehicles will display a message or indicator light confirming autostart is off.
- Know the system limitations – turning off autostart one time usually only disables it for the current driving session. The feature will reset on the next ignition cycle.
Examples by Make:
| Car Make | Autostart Disable Button Location | Dash Indicator |
|---|---|---|
| Ford | Lower dash or center console | “Auto Start-Stop Off” message |
| Toyota | Center console near the gear shifter | “Stop Start Off” light |
| Kia/Hyundai | Dashboard or steering wheel area | “ESS Off” message (ESS = Engine Stop/Start) |
2. Bypassing Autostart Through Driving Behavior (Temporary Workarounds)
In some vehicles, the driver can prevent autostart from activating by slightly altering normal driving behavior. While not a permanent solution, it allows temporary control.
Sensor-based Avoidance Techniques:
- Avoid full brake pedal release – some systems won’t restart unless the brake is fully pressed.
- Shift to neutral – on automatic transmissions, shifting to neutral before stopping may prevent shutdowns.
- Use air conditioning sparingly – if the system senses climate control needs, it may delay or cancel an autostart stop.
However, this method is not foolproof and may vary by manufacturer and vehicle model.
3. Permanent Disablement Through OBD2 Module or Aftermarket Devices
If you want a more permanent solution, some car owners opt to disable autostart using an OBD2-based module, such as a tuning chip or start-stop disable plug.
What Is an OBD2 Module?
OBD2 modules plug into your car’s On-Board Diagnostics Port (usually under the dashboard), allowing for a range of functions, including disabling the start-stop system.
Steps to Disable Autostart Using an OBD2 Plug:
- Turn off the ignition and locate the OBD2 port – usually under the steering wheel.
- Insert the start-stop disable device into the port.
- Start the car normally – the device sends a signal to bypass autostart functions.
- Confirm autostart is disabled through the vehicle’s instrument cluster.
These devices are typically plug-and-play and are compatible with specific car brands like Volkswagen, BMW, Toyota, and more.
Important Note:
Using third-party OBD2 modules can impact your vehicle’s warranty, emissions compliance, and diagnostics. Always consult a certified mechanic or read customer feedback carefully before installation.
4. ECU Programming (Professional Modification)
For owners with a deeper understanding of vehicle systems, it’s possible to disable autostart through ECU (Engine Control Unit) programming.
What Is ECU Programming?
ECU programming involves rewriting the engine control software to remove or alter autostart parameters. This is usually performed by a professional tuner or automotive modification expert.
Considerations for ECU Autostart Disable:
- Warranty implications – permanent disabling of start-stop could void warranties.
- Emissions impact – modifying factory settings may affect emission test compliance.
- Professional assistance required – improper tuning can lead to vehicle performance issues or damage to engine components.
This method is best for enthusiasts or those with modified systems, such as aftermarket turbochargers or racing configurations.
Make and Model Specific Methods to Turn Off Autostart
Not all vehicle models function the same. Below are specific methods for turning off autostart in popular makes and models.
1. Ford Vehicles (2019-2024 Models)
Ford vehicles with autostart typically have a dedicated Auto Start-Stop Off button. The light may come on briefly to confirm the system is disabled. Pressing it again reactivates the function. Note: Some models do not allow permanent disablement except via dealership-level diagnostics.
2. Toyota and Lexus Hybrid Models (Prius, Camry Hybrid, etc.)
Since many Toyota hybrid vehicles rely more heavily on automatic engine stop-start systems, disablement is not generally supported through the vehicle interface. Third-party modules or software are required for customization.
3. Volkswagen (Passat, Golf, Jetta)
Many recent VW models allow the user to turn off autostart using either a dedicated ESS (Engine Stop/Start) button or a MIB Infotainment system feature that disables the function across ignition cycles.
4. BMW 3 Series / X3 / X5 / 5 Series
Some BMW models allow drivers to use the Start-Stop Off button (displaying an “A” symbol) in the center console to turn off the system for that journey. BMW also offers ECU modifications through select dealership and aftermarket tuning tools.
5. Honda CR-V, Civic Hybrid
Honda’s Eco Assist system sometimes includes autostart functions that can be canceled either through gear shifting or climate control settings, but there is no official button to fully disable the feature.
Is It Safe to Turn Off Autostart?
Generally, yes — in most vehicles, the autostart feature is optional and can be safely disabled without damaging the engine. However, there are some important points to note before turning it off.
The Safety Advantage
Modern autostart systems are designed with engine wear reduction technologies such as reinforced starter motors, strengthened battery systems, and advanced software logic to manage wear. Disabling the feature doesn’t damage your car, but it removes a fuel-saving benefit that many manufacturers have carefully engineered.
Environmental Impact
By turning off autostart, you may use more fuel in heavy traffic or urban settings, which increases carbon emissions and reduces fuel economy. In countries with city-wide auto start-stop regulations, frequent disablement of the feature may also raise legal or compliance issues.
Battery and Alternator Considerations
If your system relies heavily on autostart for battery and alternator maintenance, turning it off for long periods may affect component longevity. This is especially true for vehicles that use absorbent glass mat (AGM) batteries, which are optimized for frequent stop-start cycles.
Conclusion: Managing Autostart for Maximum Convenience
The automatic start-stop system is a valuable feature in modern vehicles, aimed at optimizing fuel use and reducing environmental impact. However, it isn’t for everyone, especially under specific driving scenarios or personal preferences.
Whether by using a simple dashboard button, shifting behavior, OBD2 plug devices, or dealership-level ECU tuning, you have options to disable autostart and take greater control over your drive. Understanding how autostart works, and knowing when and why to turn it off, can help ensure that your car remains as reliable, comfortable, and efficient as possible — in the way that suits your driving style.
By following the strategies outlined in this guide, you can make an informed decision about managing the autostart function in your vehicle, ensuring a smoother, more personalized driving experience.
If you enjoyed this in-depth guide on how to turn off autostart on your car, don’t forget to share it with fellow drivers looking to customize their driving experience.
What is autostart on a car and why would I want to turn it off?
Autostart, often referred to as remote start or push-button start, is a feature that allows a vehicle to be started without physically inserting a key into the ignition. This function is commonly used for warming up the engine or cooling the cabin before driving. While convenient, some drivers prefer to disable autostart due to concerns about security, fuel consumption, or unintended operation when the key fob is in close proximity to the vehicle.
Disabling autostart can help prevent situations where the car starts unintentionally or where unauthorized access might occur if a signal is intercepted. It also gives the driver more control over when the vehicle is running, which may be preferred for safety or mechanical reasons. Understanding how and when to disable autostart can help ensure your vehicle operates exactly as you desire.
Can I disable autostart on all types of vehicles?
Most modern vehicles with keyless entry or push-button start systems allow the autostart feature to be disabled, although the process can vary greatly depending on the manufacturer and model. Vehicles manufactured by brands such as Ford, Toyota, Honda, and Chevrolet often include this feature, but the method of turning it off may involve using the infotainment system, a mobile app, or reprogramming vehicle settings through a dealership service.
Some older or more basic models may not come equipped with autostart technology at all, so it’s important to know your vehicle’s specifications before attempting to disable the feature. If your vehicle has a smartphone integration system like Android Auto or Apple CarPlay, the settings for autostart may be accessible through the app or built-in menu options. Always consult your vehicle’s owner’s manual or contact the dealership for precise instructions.
How do I turn off autostart using the vehicle’s settings?
Many vehicles allow you to disable autostart directly through the dashboard or infotainment system. Typically, you would turn on the ignition (without starting the engine), access the settings menu, and navigate to the vehicle security or keyless start options. There you should find a toggle or checkbox that lets you disable the autostart feature with a few button presses or touchscreen selections.
It’s important to note that the process may differ depending on the make and model of your vehicle. Some systems require you to confirm your choice through a secondary menu, while others may prompt a system reset after a change. Be sure to power through the entire procedure without interruption and restart the vehicle afterward to verify the new settings have taken effect.
Is it possible to disable autostart through a mobile app?
Yes, many vehicles that include smartphone integration offer a convenient way to manage autostart through the manufacturer’s mobile app. For example, apps like FordPass, MyHyundai, or Uconnect allow users to adjust vehicle settings remotely, including enabling or disabling autostart functionality. To do this, you generally need to pair your device with the vehicle and login to the corresponding app.
Once connected, navigate to the remote control or vehicle preferences section to locate the autostart toggle. Make sure the vehicle is parked safely and the engine is off before making this change. After saving your preference, it may take a few moments for the vehicle to sync with the app and reflect the updated setting. This method is especially useful for users comfortable managing their vehicle through a smartphone interface.
Will disabling autostart affect other features of my vehicle?
Disabling the autostart feature generally does not interfere with the other keyless functions or primary ignition system. You should still be able to lock and unlock your doors remotely, use keyless entry, and start the vehicle manually using the start button or by inserting the key fob in the designated slot. However, you may experience changes in how the vehicle responds when the key is detected near the ignition.
In some cases, specific features like climate control pre-start or security alerts may also be linked to the autostart function, and disabling autostart might limit these capabilities. If this occurs, consult your vehicle’s user manual or contact customer support for clarification on any affected systems. Most users find it possible to re-enable autostart at any time if they find the change inconvenient.
Can I have autostart turned off permanently by a professional mechanic or dealer?
Yes, if you prefer not to manage settings yourself, a qualified mechanic or dealership technician can permanently disable the autostart function for you. This typically involves reprogramming the vehicle’s internal software or modifying the key fob signal recognition system. Many manufacturers provide dealerships with proprietary software that can access and adjust these settings with minimal disruption to the rest of the vehicle’s systems.
The cost and service time for this procedure vary depending on the vehicle make and location. In some cases, if the vehicle’s system doesn’t allow software changes, the technician may physically disable one of the sensors or the receiver module responsible for detecting the remote start command. This option may also void certain warranties, so it’s important to discuss all possibilities with your service provider beforehand.
Are there any safety concerns I should be aware of when turning off autostart?
Disabling autostart primarily affects convenience rather than safety in most vehicles. However, it’s important to understand that losing autostart functionality may also remove the ability to warm up or cool down your car remotely, which could be a drawback in extreme climates. Additionally, if you rely on autostart for physically disabled drivers or as part of a vehicle accessibility feature, consider the practicality of turning it off.
There may also be implications if your car’s alarm or immobilizer system is integrated with the autostart feature. In rare cases, tampering with autostart settings could inadvertently affect theft-deterrent systems. To ensure safe operation, always back up your settings before changing them. If you’re unsure of the risks associated with your specific model, it’s advisable to seek guidance from a dealership or certified automotive technician.