To disable the brake control (Vehicle Stability Control / Traction Control) on a Toyota Prius, press and hold the VSC OFF button for about 3 seconds until the “VSC OFF” and “TRAC OFF” indicators light up on the dashboard. This procedure works for most Prius models from 2004 onward, but the exact button location and behavior vary slightly by generation.
What Is Brake Control on a Prius?
Brake control in a Prius refers to the integrated systems that manage wheel slip and stability: the Anti-lock Braking System (ABS), Traction Control (TRAC), and Vehicle Stability Control (VSC). These systems use wheel speed sensors, steering angle sensors, and a yaw rate sensor to detect loss of traction. When a wheel starts to spin or the car begins to slide, the system applies braking force to individual wheels and reduces engine power to help you maintain control.
On the Prius, these systems are always on by default. The VSC OFF button is designed for situations where you need more wheel spin, such as driving in deep snow, mud, or sand, or when using a spare tire that is smaller than the regular tires.
How to Disable Brake Control (VSC/TRAC)
The procedure is straightforward, but the button location differs by model year. Here is the general step-by-step:
- Ensure the car is in “Ready” mode (press the power button twice without touching the brake, or just press the brake and start normally).
- Locate the VSC OFF button. It is usually to the left of the steering wheel, near the dashboard, or on the center console. It has a symbol of a car with skid marks and the text “VSC OFF” or just the skid icon.
- Press and hold the button for about 3 seconds. Do not just tap it—holding is required to fully disable both TRAC and VSC.
- Check the dashboard: you should see the “TRAC OFF” and “VSC OFF” indicator lights illuminate. In some models, a message like “VSC Turned Off” appears on the multi-information display.
- To re-enable, simply press the button again briefly, or restart the car. The systems will automatically reactivate when you turn the car off and on.
Note: In some newer Prius models (2016 and later), the button may be labeled “VSC” or “Traction” and may require a different press pattern. Always check your owner’s manual for the exact procedure.
When Should You Disable Brake Control?
Disabling VSC/TRAC is not something you do for normal driving. It is only beneficial in specific low-traction situations:
- Deep snow or mud: The system may cut engine power when wheels spin, preventing you from rocking the car out.
- Sand or gravel: Wheel spin helps you gain momentum in loose surfaces.
- Using a compact spare tire: A smaller spare can confuse the system, causing it to apply brakes incorrectly. Disabling VSC prevents this.
- Driving on a dynamometer: Some emissions tests require VSC off to avoid interference.
Remember: Disabling these systems reduces stability and increases the risk of skidding. Only do it when necessary and at low speeds.
How to Disable Brake Control on Specific Prius Generations
The Prius has been sold in four main generations (XW10, XW20, XW30, XW40). Here’s how the procedure varies:
- First Generation (2001–2003): These early models often had a simple “TRAC OFF” button on the dashboard. Pressing it once disables traction control, but VSC may not be fully off. There is no dedicated VSC OFF button on some trims.
- Second Generation (2004–2009): The VSC OFF button is located to the left of the steering wheel, near the headlight leveling dial. Hold for 3 seconds to disable both TRAC and VSC.
- Third Generation (2010–2015): The button is still on the left side of the dash, but it may be labeled with just the skid icon. Holding it for 3 seconds turns off both systems. Some models also have a “Snow” mode that adjusts throttle response without fully disabling VSC.
- Fourth Generation (2016–2022): The VSC OFF button is located on the center console, near the gear selector. The procedure is the same: press and hold for 3 seconds. However, some trims have a “Traction Control” button that only disables TRAC, not VSC.
If you are unsure, consult the owner’s manual or look for the button with the car-skid icon. The symbol is universal.
Common Misconceptions and Mistakes
One common misconception is that the VSC OFF button disables the ABS. It does not. ABS remains active even when VSC and TRAC are off. Another mistake is pressing the button too briefly—a quick tap may only turn off TRAC, not VSC. You must hold it for the full 3 seconds.
Another issue: some drivers think that disabling VSC will improve fuel economy or performance. It does not. In fact, it can increase tire wear and reduce stability. The Prius is not a performance car; the systems are there to keep you safe.
If you press the button and the indicators do not light up, the button may be faulty, or the system may have a malfunction. In that case, have the car checked by a professional.
Safety and Legal Considerations
Disabling brake control systems is legal in most places, but it is not recommended for public roads. VSC and TRAC are safety features that reduce the risk of accidents, especially in emergency maneuvers. If you disable them, you are responsible for any loss of control.
Also note that the systems will automatically re-enable when you restart the car. So you must disable them every time you need them off. Never attempt to permanently disable them by pulling fuses or cutting wires—this can cause warning lights, affect other systems, and void your warranty.
Frequently Asked Questions
Does the VSC OFF button disable the brakes entirely?
No. It only disables the automatic braking intervention from VSC and the throttle reduction from TRAC. The physical brakes still work normally when you press the pedal. ABS also remains active to prevent wheel lockup.
Why is the VSC OFF button not working?
If holding the button for 3 seconds does not light up the indicators, the button may be defective, or the system may have a fault. Check the fuse for the VSC system, and if the problem persists, have the diagnostic codes read by a mechanic.
Can I disable VSC while driving?
Yes, you can press the button while driving, but it is safer to do it when the car is stationary. If you are stuck in snow, you can disable it while the car is in park or neutral.
Will disabling VSC affect my insurance or warranty?
No, pressing the button temporarily does not affect your warranty or insurance. However, if you cause an accident while VSC is off, your insurance company may investigate, but it is not automatically a reason to deny a claim.
How do I know if VSC is off?
The dashboard will show the “VSC OFF” and “TRAC OFF” warning lights. In some models, a message appears on the multi-information display. The lights stay on until you re-enable the systems or restart the car.
Template for Disabling VSC/TRAC
Vehicle: Toyota Prius (Year: ________)
Procedure:
- Start the car (press power button with brake).
- Locate the VSC OFF button (left of steering wheel or center console).
- Press and hold the button for 3 seconds.
- Check that the “VSC OFF” and “TRAC OFF” lights are on.
- To re-enable, press the button briefly or restart the car.
Notes: The button may be labeled with a car-skid icon. If the lights do not appear, consult the owner’s manual.
Sample (fictional): 2012 Toyota Prius, button left of steering wheel. Held for 3 seconds, lights came on. Re-enabled by pressing once.