Press the Auto Start‑Stop button left of the steering wheel once to enable the system; an indicator will appear on the information panel confirming activation. When enabled, the engine will shut off automatically at full stops to save fuel and lower emissions, then restart when you release the brake or select drive. You can temporarily disable Start‑Stop with the dedicated button above Sport for towing or heavy A/C load, and the vehicle remembers the last choice until shutdown — more details follow.
Quick Answer: Turn Supra Auto Start‑Stop On or Off
Locate the Auto Start‑Stop button just above the Sport button on the dashboard and press it once to toggle the system on; you’ll see indicators confirm activation. To turn it off, press the same button again—your Supra remembers that choice and retains the setting for the next drive. Use it in stop‑and‑go traffic to maximize fuel savings; this feature benefits drivers who want efficiency without sacrificing control. You’ll notice the engine shuts when stopped and restarts automatically when you release the brake or engage drive, but you can override it whenever you want. Address common concerns by testing the behavior in a safe area so you regain confidence: the logic is predictable, the override is immediate, and the system resets only when you tell it to.
What Start‑Stop Does in the Toyota Supra
Now that you know how to toggle the system, here’s what Start‑Stop actually does in the Supra: it shuts the engine off automatically when the car is stationary—like at a red light or stop sign—to cut idle fuel use and lower emissions, then restarts smoothly when you release the brake (or engage drive). You’ll see an indicator icon on the information panel while the engine is off, confirming the system’s state. Functionally, Start‑Stop reduces wasted fuel and provides measurable fuel efficiency gains—around 1 mpg in city driving—supporting emissions reduction goals. If you want control, you can disable the feature with the button left of the steering wheel and reactivate it anytime, preserving your autonomy.
How to Enable Start‑Stop (Step‑by‑Step)
Start the Supra, then press the Auto Start‑Stop button to the left of the steering wheel once to enable the system; the engine will then shut off automatically when the car is stationary and restart when you release the brake (or engage drive). You’ll see an indicator icon on the information panel confirming activation. The system engages every time you start the engine unless you disable it. To enable: 1) Locate the on/off button left of the steering wheel. 2) Press once; confirm the icon. 3) Drive normally—engine will stop at idle and restart as needed. This procedure reduces idle time, improving engine efficiency and delivering measurable fuel savings. Adopt it to reclaim control of your driving economy and environmental impact.
How to Temporarily Disable Start‑Stop and Where the Button Is
The Auto Start‑Stop can be temporarily disabled by pressing the dedicated button positioned above the Sport button on the center console; press it once and the engine will stay running until you turn the vehicle off. Locate that button—this button location is intuitive on the console cluster. Pressing it toggles the system off; an indicator icon on the information panel confirms the Start‑Stop system is disabled. Use this when towing, hauling, or demanding peak A/C performance to exploit the feature benefits while maintaining control. The system reactivates automatically with the next engine start, but you can disable it again with the same control. Follow this procedure whenever you need uninterrupted power or simplified operation without permanently altering settings.
Does the Supra Remember Your Start‑Stop Setting?
The Supra will remember your last Auto Start‑Stop setting, so if you turn a.s.s. off it stays off after you shut the car down and restart it. The a.s.s. disable button sits above the Sport button and pressing it again reactivates the system. Note that Sport mode itself doesn’t retain a permanent default, so you’ll need to reselect it each drive.
Memory For Start‑Stop
Although the Supra enables auto start-stop by default, you can disable it with the dedicated button above the Sport button, and the car will remember that choice until you restart it. Use that control to set memory settings that match your user preferences each drive. When you press the button, the system toggles immediately; owners confirm the last state persists across ignition cycles. That means you can opt out of start-stop without changing behavior every time you drive—until the next restart resets to default. To restore the feature, press the same button again; the change is instant. Toyota currently doesn’t provide a permanent disable in software, so manage freedom via the toggle and resist automatic engagement by setting your preference at start.
Reset On Restart
Check your setting each time you start the Supra: disabling Auto Start‑Stop via the button above Sport will persist only for that driving session, but the system resets to its default (enabled) when you restart the vehicle, so you’ll need to toggle it again if you want it off. The Supra’s reset behavior mirrors BMW’s approach — it remembers the last in‑session choice but re‑engages on ignition, so you control freedom per trip while the car maintains default safety.
- Press the a.s.s. button above Sport to disable for the session.
- The system retains that in‑session user preferences until shutdown.
- On restart, Auto Start‑Stop resets to enabled automatically.
- Owners seeking permanent defaults must toggle each start; firmware options are limited.
Make Start‑Stop Permanent: Dealer, Coding, and App Options
If you want Start‑Stop to stay disabled, your best options are dealer coding, waiting for an app update, or relying on the vehicle’s memory of the last setting. You can contact dealer options to ask about coding that sets Start‑Stop off by default; dealers can reprogram ECU parameters when supported. Monitor Supra Connect for app updates that might expose persistent settings—owners have requested this, but it isn’t available now. Rely on the car’s retained last‑state: disable Start‑Stop before shutdown and the vehicle will remember it until you change it. To reenable, press the Start‑Stop toggle button; it’s immediate. Choose dealer coding for permanence, app updates for noninvasive control, or the memory method for DIY consistency.
When You Should Turn Start‑Stop Off (Towing, A/C, Safety)
When you’re towing or carrying heavy loads, turn Start‑Stop off to prevent unnecessary engine cycling and protect driveline performance. Disable it when you need maximum A/C output or continuous cabin airflow—engine shutdown during idle can reduce cooling and worsen window fogging. Press the dashboard Start‑Stop button to disable the system and confirm the off state via the information‑panel icon.
Towing And Load Safety
Because towing or carrying heavy loads changes your power and cooling needs, you should disable the Auto Start‑Stop to keep the engine running continuously for consistent torque and accessory performance.
- When towing or hauling, prioritize towing safety and load management: disable Start‑Stop so the engine supplies steady torque to the drivetrain and trailer brakes.
- Use the Start‑Stop OFF button left of the steering wheel to prevent unwanted shutdowns during critical maneuvers.
- Verify the dashboard indicator confirms the system is disabled before you set off; this gives you clear status and control.
- If windows fog while loaded or electrical accessories need constant power, keep the engine running for reliable defogging and accessory performance.
Disable Start‑Stop deliberately to maintain control, stability, and freedom while towing.
Maximize A/C Performance
Although Auto Start‑Stop saves fuel, you should disable it to keep the A/C compressor running continuously for reliable cabin cooling and defogging during idle or slow traffic. When you want uncompromised A/C efficiency and steady cabin climate control, turn the Start‑Stop off via the button left of the steering wheel. Continuous engine operation preserves A/C pressure, prevents intermittent compressor cycling, and sustains ventilation without lag. This also stabilizes engine performance under accessory load, which is important when you need firm throttle response or electrical power. Remember the system defaults on at restart, so manually deactivate each time you want persistent cooling. Disable Start‑Stop for controlled, liberated driving when immediate, consistent A/C output or predictable engine performance matters most.
Visibility And Fogging Risks
If you notice windows fogging or need immediate throttle response for merging or towing, turn the Auto Start‑Stop off to keep the engine and A/C compressor running continuously; this preserves blower airflow and defogging heat, prevents intermittent compressor cycling that reduces cooling, and eliminates the lag from restarting when you need instant power.
- When towing: disable Start‑Stop to maintain torque and avoid restart delays that compromise control and safety.
- In high heat or humidity: keep it off to sustain A/C capacity for fogging prevention and visibility enhancement.
- During merges or evasive maneuvers: deactivate to guarantee immediate throttle response.
- If windows begin to fog: switch it off to preserve continuous blower heat and moisture extraction.
You’re free to override default activation whenever conditions threaten control or clear vision.
Start‑Stop Problems and Fixes (Icons, Errors, Failed Restarts)
When your Supra’s Start‑Stop won’t engage or shows an error icon, first confirm you’re fully stopped with the brake pedal depressed and check the Start‑Stop indicator on the information panel—if the icon isn’t lit the system may be disabled via the dedicated button or unmet conditions like low battery charge or incorrect engine temperature. For start stop troubleshooting, verify battery health and charge, and verify engine temperature is within operating range; extreme cold or heat and low voltage are common errors that prevent engagement. If the engine fails to restart, release the brake fully then reapply it to prompt a restart. Reactivate the system with the button if needed. Schedule regular battery and system diagnostics to avoid persistent faults and regain control.
How Start‑Stop Interacts With Sport Mode, Traction Control, and Remote/Connected Start
Because the Supra keeps Auto Start‑Stop independent of Sport mode and traction control, you can drive more aggressively without losing the system’s stop‑and‑start benefits at a halt. You control Auto Start‑Stop with the dedicated button above Sport mode; it remembers your last choice between drives but you can toggle it anytime.
- Sport mode interaction: Engaging Sport mode won’t disable Start‑Stop, so you get performance and idle fuel savings simultaneously.
- Traction control implications: Traction control stays engaged in Sport mode, preserving safety while you push handling limits.
- Remote start considerations: Key‑fob remote start isn’t available; owners want Supra Connect app integration for remote activation.
- User experience feedback: Users ask for clearer, more intuitive settings and persistent preferences beyond the current memory behavior.
Frequently Asked Questions
How Do I Activate Start-Stop Engine?
Press the Auto Start-Stop button left of the wheel to activate; the system enhances engine efficiency and fuel savings by shutting the engine at 0 mph and restarting when you release the brake, giving you liberated, efficient control.
Does the 2026 Toyota Supra Have Remote Start?
About 78% of Supra owners want remote start features. You don’t get remote start on the 2026 Toyota Supra yet, but you can watch Toyota Supra options and Supra Connect app updates for potential future availability.
Why Is My Toyota Auto Start-Stop Not Working?
Your Auto Start-Stop’s not working because system settings, low battery health, Sport mode, cold engine, high load (AC/towing), or incomplete brake depression prevent engagement; check settings, battery health, warnings, and operating conditions to restore function.
Conclusion
You’ve got the gist: start‑stop helps save fuel and reduce idling, and you can toggle it via the Supra’s center switch or temporarily disable it per drive. If you want it off by default, ask your dealer or use coding/apps—just know that’s a mild customization that can affect warranty or systems. Turn it off for towing, heavy A/C use, or safety concerns. If errors pop up, have diagnostics run to restore proper, reliable operation.
