Tesla alert code · Tire monitoring
RideRite tools
Run it free
Learn more
Learn more
Tesla VCSEC_a221 alert: Air pressure below recommendation for tires
VCSEC_a221
Air pressure below recommendation for tires
Check pressure and refill air as needed
Worth watching
Top line is Tesla's on-screen wording. The level is RideRite's own read.
6 / 23
Teslas on RideRite's tools that have logged VCSEC_a221
8
times it was recorded in all, as of September 2026
Short answer
At least one tire is below Tesla's recommended pressure. Level: worth watching.
What VCSEC_a221 means
At least one tire is below Tesla's recommended pressure. This is Tesla's soft, early tire pressure warning (internal name VCSEC_a221_TPMSSoftWarning), which fires when a sensor reads below a set percentage of the recommended cold pressure. A single low reading after a cold night is common; the same tire going low again and again usually means a slow leak.
What to do
- 1Check all four tires cold and fill to the pressure on the door jamb placard.
- 2Note which tire was low. If the same one drops again within a week or two, have it checked for a nail or a leaking valve.
- 3Low pressure wears tires faster and cuts range, so do not leave it.
Check your own Tesla
Free
Free RideRite Health Check
Every alert your Tesla has stored, battery health against new, tire pressures and warranty left. Read-only, about a minute.
Ongoing
RideRite Watch
An email in plain English if VCSEC_a221 comes back or a new alert appears, plus slow tire leaks and battery drain while parked.
Written review
Master Tech Review
A RideRite master technician reads everything your car reported and tells you what to fix now, what can wait, and what Tesla may still owe you.
Get it fixed
Want VCSEC_a221 looked at without a trip to the service center?
Ride Rite is a mobile Tesla repair shop based in San Jose. We diagnose tire pressure and TPMS warnings in your driveway or office lot across the Bay Area with dealer-grade diagnostic equipment, then tell you plainly what the car needs.
Common questions
How low is too low for VCSEC_a221?
Tesla triggers it when a tire drops meaningfully below the recommended cold pressure on the door placard. Refill to that number.
How can I tell if it is a slow leak?
Compare readings over days. RideRite Watch tracks each tire over time and emails you when one keeps dropping on its own, which is the pattern of a slow leak.
Most requested upgrade
Drive a pre-refresh Model 3 or Model Y? Get the newer Tesla suspension.
Tesla redesigned the springs and dampers for the refreshed Highland Model 3 and Juniper Model Y to fix the firm, harsh feel of earlier cars. We install that genuine Tesla hardware on 2017 to 2023 Model 3s and 2020 to 2024 Model Ys, at your home or office.
See pricing and book onlineSources: the alert text and internal alert name your car reports to Tesla, Tesla's owner's manual where the code is listed, and alert records from Teslas connected to RideRite's tools.
All Tesla alert codes explained
Ride Rite Mobile Auto Services is an independent mobile Tesla repair shop in San Jose, California. Not affiliated with Tesla, Inc. General information, not a diagnosis of your specific car. Updated September 2026.
