The auto stop/start system in modern vehicles, including the 2018 Audi lineup, is designed to boost fuel efficiency and reduce emissions. While environmentally conscious, this feature can sometimes be perceived as intrusive or inconvenient by drivers. If you’re finding the auto stop/start in your 2018 Audi less than desirable, you might be exploring options to disable it. Fortunately, using an OBD2 scanner offers a viable solution to customize this setting to your preference.
Understanding Auto Stop/Start in Your 2018 Audi
The auto stop/start system, also known as automatic engine stop/start (ESS), temporarily shuts off the engine when your Audi comes to a complete stop – for instance, at traffic lights or in stop-and-go traffic. It seamlessly restarts the engine when you release the brake pedal, allowing you to proceed. While this system contributes to fuel savings and lower emissions in urban driving conditions, some drivers find it jarring or prefer to have more control over when their engine is running. Common complaints include:
- Delayed Response: A slight delay in engine restart can feel sluggish when trying to accelerate quickly after stopping.
- Wear and Tear: Concerns about increased wear on the starter motor and battery due to frequent stop/start cycles, although modern systems are designed to mitigate this.
- Inconvenience in Certain Situations: Drivers might find it bothersome in heavy traffic or when performing maneuvers like parallel parking.
For 2018 Audi models, the auto stop/start system is generally active by default. While some models may have a button to temporarily disable it, this typically needs to be pressed every time you start the car, which can become repetitive. For a more permanent or default-off solution, OBD2 modification is often considered.
Disabling Auto Stop with an OBD2 Scanner: What You Need to Know
An OBD2 (On-Board Diagnostics II) scanner is a tool that allows you to communicate with your car’s computer system. It’s primarily used for diagnosing issues, but advanced scanners also offer customization options, including the ability to modify vehicle settings. Disabling the auto stop/start feature on a 2018 Audi is often achievable through OBD2 programming, offering a more persistent solution than manually deactivating it each drive.
Tools Required:
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OBD2 Scanner: You’ll need an OBD2 scanner capable of advanced coding or adaptation. Popular options for Audi vehicles include:
- VCDS (Vag-Com Diagnostic System): A widely respected and comprehensive tool favored by Audi enthusiasts and professionals.
- OBDeleven: A user-friendly, app-based scanner that offers coding capabilities for Volkswagen Group vehicles, including Audi.
- Other Professional-Grade Scanners: Various professional diagnostic scanners from brands like Autel, Launch, and others may also offer the necessary functions.
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Laptop or Mobile Device: Depending on the scanner, you may need a laptop (for VCDS) or a smartphone/tablet (for OBDeleven and some other tools) to run the software and interface with the scanner.
General Steps (using VCDS as an example – steps may vary depending on the scanner and Audi model):
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Connect the OBD2 Scanner: Plug your OBD2 scanner into the OBD2 port of your 2018 Audi. This port is typically located under the dashboard on the driver’s side.
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Establish Communication: Turn on your car’s ignition (but don’t start the engine). Launch the scanner software on your laptop or mobile device and establish communication with your vehicle’s control modules.
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Access Control Modules: Navigate to the “Engine Control Module” (ECM) or similar module responsible for engine management.
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Adaptation or Coding: Look for options like “Adaptation” or “Coding.” The specific menu names and procedures will vary based on your scanner and the exact Audi model year.
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Disable Auto Stop/Start: Within the adaptation or coding settings, search for parameters related to “Start/Stop system,” “Auto Stop,” or “ESS.” You may find options to:
- Decrease Voltage Threshold: Some methods involve lowering the voltage threshold at which the system activates, effectively preventing it from engaging under normal driving conditions.
- Disable Functionality Directly: Certain coding options might allow you to directly disable the auto stop/start function.
- “Remember Last Setting” Function: Some newer methods aim to code the system to remember the last manual setting (disabled) across ignition cycles, if available on your model.
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Apply Changes and Test: After making the necessary adjustments, save the new settings using your OBD2 scanner software. Start your car and test if the auto stop/start system is now disabled as desired. You might need to clear any fault codes that may arise after coding.
Important Considerations:
- Scanner Compatibility: Ensure that the OBD2 scanner you choose is compatible with your 2018 Audi model and supports the necessary coding or adaptation functions.
- Software and Procedures: The exact steps and software interface will vary depending on the scanner and your Audi’s specific software version. Consult your scanner’s manual or online resources for detailed instructions relevant to your tool and vehicle. Online forums and Audi enthusiast communities can also provide valuable guidance.
- Potential Warranty Implications: While disabling auto stop/start via OBD2 is generally reversible, it’s wise to be aware that modifications to your vehicle’s software could potentially raise questions if you need to make a warranty claim related to the engine or electrical system in the future. However, simply disabling a convenience feature like auto stop/start is unlikely to void your entire warranty.
- Reversibility: OBD2 modifications are generally reversible. You can typically use your scanner to revert the changes back to the original settings if you wish to re-enable the auto stop/start system later.
Conclusion
Disabling the auto stop/start feature on your 2018 Audi using an OBD2 scanner is a feasible option for drivers seeking more control over this function. By using the right tools and following the correct procedures, you can customize your driving experience to better suit your preferences. Remember to proceed with caution, consult reliable resources, and understand the potential implications before making any modifications to your vehicle’s software. Always prioritize safety and ensure that any changes you make are within legal and ethical boundaries. For those uncomfortable with DIY coding, seeking assistance from a qualified mechanic or Audi specialist experienced in OBD2 programming is always a prudent choice.
