The low tire pressure warning on a 2021 Honda Civic is cleared by inflating all tires to the recommended cold pressures and then calibrating the TPMS (tire pressure monitoring system). If the warning persists after inflation and calibration, inspect tires for leaks or damage and consider a TPMS reset or professional service.
Check tire pressures
Before touching the TPMS itself, verify every tire is at the recommended pressure using a reliable gauge. The exact PSI is listed on the driver’s door jamb placard or in the owner's manual.
- Park on a level surface and ensure the tires are cold (no driving for at least three hours). Cold tires give the most accurate readings.
- Locate the recommended tire pressure for your Civic on the driver’s door jamb placard or in the owner's manual for your trim and tire size.
- Use a tire pressure gauge to measure each tire’s PSI and compare it to the recommended value.
- If any tire is underinflated, add air until it reaches the recommended pressure, then recheck all tires.
- Inspect tires for punctures, leaks, or damaged valve stems if any tire continues to lose pressure after inflation.
After inflating to the recommended pressures, the low tire pressure warning may clear automatically. If it does not, proceed to reset the TPMS calibration.
Resetting the TPMS
Many 2021 Civics require a manual TPMS calibration to relearn the new tire pressures after inflation or rotation. The exact menu path can vary by trim and infotainment version, but the typical process is described below.
- Turn the ignition to ON (engine off) and access the vehicle’s Settings or Menu using the steering wheel controls or touchscreen.
- Navigate to Vehicle Settings (or TPMS Settings) and select TPMS Calibration or Reset.
- Confirm the reset/calibration. The system will begin learning the current tire pressures.
- Drive straight at speeds around 30–50 mph (50–80 km/h) for about 10 minutes to complete the relearn. Avoid aggressive driving during this period.
- If the warning light remains after the relearn, double-check tire pressures again and look for leaks; if that fails, contact a Honda dealer for sensor diagnostics or TPMS service.
After performing these steps, the TPMS light should turn off once the system has successfully relearned the pressures.
When to seek service
Even with a successful reset, certain conditions require professional attention. If any tire cannot be inflated to the recommended pressure, if you notice nails, cuts, or sidewall damage, or if the TPMS warning reappears repeatedly after a reset, schedule service. Faulty sensors, damaged valves, or broken wheel rims may require diagnostic tools and replacement parts.
Common signals that indicate you should seek professional service include persistent warnings after inflation and calibration, visible tire damage, or repeated pressure loss.
- Persistent low-pressure warnings after inflation and calibration.
- Tire with visible damage or slow air leaks that won’t seal.
- TPMS indicators that do not extinguish after a complete reset.
- Recent tire rotation or replacement may require recalibration.
Note: If you are unsure about the procedure or the light reappears after attempting these steps, consult your owner's manual or contact a Honda dealer for guidance.
Summary
To clear a low tire pressure warning on a 2021 Honda Civic, start by ensuring every tire is inflated to the recommended cold pressure, then perform a TPMS calibration if needed. Drive at highway speeds for a short period to complete the relearn. If the warning persists, check for leaks or seek professional service to diagnose potential sensor or valve issues. Regularly monitoring tire pressure and understanding your vehicle’s TPMS procedure can prevent needless warning lights and improve safety.