185 75 r15 to 205 70 r15 possible?

Most reputable tire shops have the tool to access the tire monitor system. The tire pressure sensors in each tire have a battery that goes dead eventually.

If your wheel has been damaged it is possible it is egg shaped or oblong, however minutely it is bent, can cause air to leak when the tire is resting on one side but not the other. And like Steve said previously, you could have a hairline crack either around the valve stem or along the bead of the tire. If you want to test this theory have a tire shop switch two tires and two wheels. Mark them with a marker or something semi permanent to track them. If the assumed bad tire leaks on another wheel, it's that tire. If it doesn't, have a wheel shop inspect the other wheel or replace it.

check the air pressure in all tires and in some vehicles even the spare ---if all tires good and still lit up possible sensor failure --in future could you please enter more information like vehicle

Replace it

It is inside the tire

It is the tire stem & sensor assy

Question, you replaced tire on same rim? did you torque to specs? possible over tightened, possible coincidence and brakes are metal to metal.

its possible that the belts have broke in the tire causing the bump in tire. there is no other fix but to replace tire even if it is a used one for 25 bucks

if this problem started after you replaced the tires then that is were you start to look for the problem.you don`t say if they were new or used tires.it`s possible that there is a bad belt in one or more of the tires.this can happen even with a new tire.the other area to check for is if the wheels were properly installed(something caught between rim and mounting surface.

See if the tire is if good condition .How long have you use this tire,some when using it too long it loses it's shape,that why it make that noise,it loses the circular shape,this is one possibility,second possibility is you near two check the wheel bearing may be it need to be lubricate with grease.Hope that clear your mind and help you.

Must have codes for check engine light cleared with scan tool. Check all tire pressures and road test up to 35 mph. Tire message should clear if low tire was problem. If light for tires remains then possible radio frequency sensor problem. Sensor replacement may be necessary. Sensors have alkaline non-serviceable batteries. If battery is dead sensor will have to be replaced.

call the tirerack, they are the industry leaders for info like this.
phone 888-541-1777