Hey guys, I have been noticing that my TPMS warning light would come on for my front left tire despite that the air pressure been the same as the other tires.

I don't think the TPMS is broken as I can see the PSI increases as I drive on the freeway.

I am not sure what is going on. anyone got a clue?

 

Never experienced that, nor heard of it happening. Could the wheel's TPMS sensor's battery be low and sending a signal? Have you tried resetting the TPMS system?

 

That's what I was considering. If the car had the TPS set with one tire being out of spec set at the baseline, that could very well require a reset of the baseline.

I believe it is under the steering column in the panel near where the foot well light is.

 

Head to work this morning and notice the TPMSs were not showing any reading. Occasionally this happens but starts showing afterwards. Also the low tire pressure light started blinking. All tires are at nominal pressure.. Will check this afternoon if it fixes.

 

You have posted about your IS200T in an old GS 350 forum thread.

I suspect the IS forum would be a better place to start a new thread about your TPMS issue.

 

I would guess the baseline is set low. So maybe the system is warning you telling you that it thinks the tire pressure is too high compared to its baseline.

 

Don't forget when the temperature drops air pressure drops too. Checked mine last week before driving out of state & all 4 were 5 psi low.

 

With the colder weather here in Chicago, this has happened to me a few times on my brand new tires mounted earlier this February.

Jump onto a highway and simply drive and warm up your tires..this should remove the warning.

 

Problem fixed that same afternoon, it started showing the pressure as usual. Thanks guys for all the tips! Happy Holidays

 

sorry, posted to wrong section of the forum.

 

It drops about 1 psi for every 10 degrees farenheit. I fill my tires about 2 psi above the 33 psi the placard requires. This will cancel the low winter temperatures.

 

For some unknown reason it's common for the TPMS readouts to stop displaying temporarily - and often for a prolonged period of time - when ambient temperatures drop.

 

There is a phenomenon known as digital delay propagation. It is common in high tech equipment.

 

"I haven't seen this before, oh no, it's orange and doesn't look like the other 3, I better take it to the dealer", I'm sure this is common.