TPMS Tire Pressure Below Threshold
What does TESLA-TIRE_A050 mean?
The TESLA-TIRE_A050 (Tesla) EV fault code means: TPMS Tire Pressure Below Threshold. This is a moderate severity code.
Common Symptoms
- Touchscreen displays a tire pressure warning with a diagram highlighting the specific low tire
- Yellow tire pressure indicator illuminates on the instrument cluster
- Notification banner appears on the touchscreen at startup or while driving
- Vehicle feels slightly sluggish in steering or pulls mildly to one side
- Ride quality feels softer or bouncier than normal on the affected corner
- Scan My Tesla app with OBDLink MX+ or Veepeak adapter shows TIRE_a050 active in the chassis fault list
- Warning may clear temporarily after driving warms the tires but returns the next cold morning
Probable Causes (Ranked by Likelihood)
- Ambient temperature drop causing natural pressure reduction (1-2 PSI per 10 degrees Fahrenheit) Very Likely
- Slow leak from a nail, screw, or road debris puncture in the tread Likely
- Tire not topped up to door-jamb spec after last inflation or rotation Likely
- Valve stem leak due to corrosion, loose core, or damaged rubber seal Possible
- Bead seal leak from a bent or corroded wheel rim allowing air to seep past the tire bead Possible
- Faulty TPMS sensor giving a false low reading when actual pressure is within spec Less Likely
- Tire sidewall damage or slow structural leak after a curb or pothole impact Less Likely
Step-by-Step Diagnostic Procedure
Check the touchscreen pressure readout first. Navigate to Controls > Service > Tire Pressure to see real-time PSI for all four corners. Note which tire is flagged and how far below spec it reads.
Find your target pressure on the door-jamb sticker on the driver-side B-pillar. Most Tesla Model 3 and Model Y variants spec 42-45 PSI front and rear. Model S and Model X vary by wheel size, so always use the sticker, not a general number.
Use a quality digital tire gauge to verify the touchscreen reading at the valve stem. If the gauge and the touchscreen agree, the sensor is reporting correctly. If they disagree by more than 3 PSI, suspect a faulty TPMS sensor.
Inflate the low tire to door-jamb spec with a portable compressor or at a gas station. Drive above 15 MPH for at least one minute. The TPMS system on Tesla updates live and the warning should clear within a couple of minutes of driving if the pressure holds.
If the tire loses pressure again within 24-48 hours, do a soap-and-water test. Mix dish soap with water in a spray bottle and spray around the entire tread, sidewall, valve stem, and wheel bead area. Look for bubbles indicating an air leak.
Remove the valve stem cap and press the core with a small object. If air hisses out when you are not pressing, the core is loose. A valve core tool ($5 at any auto parts store) lets you tighten or replace it yourself.
If you find a nail or screw in the tread and the tire is holding pressure for now, drive carefully to a tire shop. Do not attempt to remove the object before repair, as it is acting as a partial plug. Plugging or patching is typically a $20-$30 shop repair.
If the tire is consistently within 1-2 PSI of spec but the warning keeps returning in cold weather, simply inflate to the upper end of the door-jamb range in fall and winter. If the TPMS sensor itself is suspected faulty, you will need a TPMS sensor tool or Tesla Toolbox 3 at a service center to confirm the sensor ID and live output.
Common Fixes by Vehicle
What techs usually find when diagnosing TESLA-TIRE_A050 on specific platforms:
TIRE_a050 (Tire Pressure Low) shows the specific affected tire on the touchscreen. Check the door-jamb spec (typically 42-45 PSI on Model 3/Y, varies by trim and tire size). Cold mornings naturally drop pressure 1-2 PSI per 10°F drop. If a single tire repeatedly drops while others hold, you have a slow leak -- inspect the tread for nails (do this in daylight at home, not at a dealer). Bring a portable inflator with digital gauge to keep in the frunk -- Tesla's tires are aero-optimized low-profile and very sensitive to under-inflation (range drops noticeably).
Labor: 5-10 min Common fix part Portable Tire Inflator with Digital Gauge View on Amazon→Frequently Asked Questions
What does Tesla code TIRE_a050 mean?
It means the TPMS system has detected that one or more tires have dropped below the minimum pressure threshold. Tesla will show you which specific tire is low on the touchscreen. Cold weather is the most common trigger because tire pressure drops about 1-2 PSI for every 10 degree Fahrenheit drop in temperature.
Can I still drive with TIRE_a050 active?
For short distances at low speed, yes, but you should not ignore it or drive at highway speeds with a significantly underinflated tire. Running low pressure damages the tire structure over time, reduces handling and braking performance, and can lead to a blowout if the tire is also punctured. Top it up as soon as possible.
How much does it cost to fix TIRE_a050?
If it is just cold weather causing a natural pressure drop, it costs nothing but a few minutes and maybe a dollar of air at a gas station. A valve stem repair is $5-$15 DIY. A professional tire plug or patch runs $20-$40. If the TPMS sensor itself needs replacement, budget $60-$180 at an independent shop or $150-$250 at a Tesla service center per corner.
Will TIRE_a050 clear on its own after I inflate the tire?
Yes. Inflate the tire to the door-jamb spec and drive above 15 MPH for at least a minute. The Tesla TPMS updates in real time and the warning and fault code should clear automatically once pressure is back in range. If the code returns within a day or two, you likely have a slow leak that needs a shop repair.