Skip the auto shop - Our mechanics make house calls

Q: Tire continues to deflate

asked by on

Front passenger tire had previously been patched from nail by dealership in Aug '16. 2 months ago (Dec '16) it gradually started to lose air. Dealer rechecked & wants $162 for new tire. 2nd mechanic said it was stem valve core not tire so he replaced that. It still loses air. Each day I bring it up to 35 pounds of pressure & the next morning it will deflate to 12-17. I feel like it may not be the tire (tried soap and water method) & find no leaks anywhere. I hate to buy a tire if that's not the problem. If needed tire is P205/70 R16. Ideas?

My car has 20835 miles.
My car has an automatic transmission.

Since you did not state the reason the dealer suggests a new tire, I can only speculate as to what they found. A 12 to 17 psi loss over a day is a good leak. If soapy water is not showing you anything, then the wheel and tire should be submerged in water and checked. It’s usually more telling than soapy water. I would say that leaking around the bead area is a possibility, but that would be typically be seen in older vehicles where the wheels have corroded a bit and didn’t seal properly, but anything is possible. It could even be a cracked wheel. Dunk it in some water and it should become apparent where the leak is coming from.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Tire continues to deflate

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Engine knocking

Hi there. An engine knock can occur in many different instances. Your vehicle may have not received the proper lubrication under heavy load at one point. Without an in person diagnosis, it is difficult to pinpoint exactly what is wrong...

Q: on/off humming buzzing noise on highway

Hey there, it looks like there was a problem with the link you added. However, from what you described, it sounds like the noise may be the cooling fan coming on and off as you are driving. Check the cooling...

Q: Ciutch needs to be repaired/replaced,

Hi there. It is probably a good idea to have one of our local mobile mechanics come to your daughter's location and complete a clutch is not working inspection first, so they can determine precisely what needs to be replaced...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.