To reset the tire pressure monitoring system (TPMS) on a 2021 Honda Accord, follow these detailed steps to ensure the system is calibrated correctly:

 
Step 1: Park the Vehicle Safely
 

• Ensure the car is parked on a level surface and the parking brake is applied.
• Turn off the engine and remove the key from the ignition if using a key-based system or press the start/stop button to ensure the vehicle is completely off.

 
Step 2: Check Tire Pressure
 

• Before resetting the TPMS, ensure that all tires, including the spare if applicable, are properly inflated to the recommended pressure levels. The correct tire pressures can typically be found on a sticker located on the driver's side doorjamb or in the owner's manual.

 
Step 3: Turn on the Ignition
 

• Insert the key into the ignition and turn it to the "On" position, but do not start the engine. If your vehicle has a start/stop button, press it twice without applying the brake pedal to achieve the same effect.

 
Step 4: Access the Infotainment System
 

• Locate the settings menu on your Honda Accord's infotainment screen.
• Use the touchscreen or the center control knob to navigate through menus.

 
Step 5: Select TPMS Calibration
 

• In the settings menu, find and select the "Vehicle" option.
• Scroll down to locate "TPMS Calibration" and select it to initiate the calibration process.

 
Step 6: Start the Calibration
 

• Choose the "Calibrate" or "Initialize" option to reset the TPMS system.
• Confirm your selection if prompted by the system.

 
Step 7: Drive the Vehicle
 

• Once the calibration process has started, drive your Honda Accord for at least 30 minutes at a speed of more than 30 mph (48 km/h). This allows the system to detect the correct tire pressures and reset the warning lights if needed.

 
Step 8: Verify the Reset
 

• After completing the drive, ensure the TPMS warning light on the dashboard is turned off, indicating that the system is reset. If the light remains on, repeat the tire pressure checks and calibration process, and consult with a Honda dealership if necessary.

These steps should help you effectively reset the TPMS on your 2021 Honda Accord, ensuring the tire pressure monitoring system functions optimally.