bclexus

I had a similar weird event happen to the navigation screen display where it went into rapid shaking. I shut off the car and re-started it and everything was normal. That incident only happened one time over a year ago.

bclexus

Well, I have resurrected my own year-old thread!

Cold temperatures have moved into the Dallas area this week and my tire pressures are not displaying again, just dashes (---) for each tire. This happened a year ago, but back then it only failed to display a couple of times...and it started displaying after only a few minutes. Then, it started displaying right away as usual for a whole year until now.

Yesterday, I added some air to tweak my tire pressure with colder temperatures coming, but just adding a few psi to each tire shouldn't have triggered anything. All tires displayed their tire pressure (after I added air), but I noticed that one tire was rather slow to indicate the increased pressure until I had driven about a mile...then everything seemed to work just fine as usual. But then the next couple of times I drove the car the tire pressures did not display at all until I drove for a few minutes. It's always displayed after driving just 30 feet or so. Now, the last two times I have driven the car the tire pressures did not display at all - even after driving for 15-20 minutes. Just dashes (---).

It seems likely that maybe cold temperatures may have triggered the malfunction, but I really have no clue why my tire pressure suddenly is not displaying. Any tips or suggestions?

drgrant

If you have an OBDII tool or Carista it might tell you more about the sensors.... although it might say nothing. Eventually I think if you get the dashes for a prolonged period of time the system will wig out and throw a low tire warning light. Mine took about a month with the bogus sensors before it did that. Or at least I think the sensors are bogus. I'll find out when I put my Cinturatos back on the car for the winter. (diff set of rims with OEM sensors). Course I might have to have a tire shop "Train" them to the car again.... I probably should just get a TPMS programmer/tool thing....

-Mike

bclexus

I checked for codes - nothing.

I fully expected the tire pressure display to start working normally again after a couple of minutes (like last year in October when the temperature dropped), but it never did. Just for the heck of it I tried hitting the reset button under the dash, both with the engine running and also with just the ignition On. Nothing.

ItzFilyO

It's cooling down in Cali too, low 50s in the morning and mine displays instantly after I turn on the engine. There are times that it was blank for a few mins but most of the time it shows right away. Maybe ur sensors are going bad, all 4 of them?

bclexus

I want to say the problem is associated with the much cooler temperatures here in Dallas, but... All my vehicles are garaged and this morning the garage temperature was 65° even though the low last night was 29°. I drove the GS 350 this morning and still no tire pressure values were displayed. My GS 350 is now 7 years old. I presume the problem could be the TPMS batteries could be weak and they don't like cold temperatures, but... I could see maybe one battery being really weak and not displaying a value, but all four - I doubt it. I wish I knew what the problem is...

bclexus

Update:

I drove the car numerous [separate] times throughout the day today with no tire pressure values ever displaying, just dashes (---) for all four tires. I just left the display to monitor tire pressure, which is where I always have it. As a last check of the day I decided to turn On the ignition without starting the engine. The display showed the driver's door was open so I closed the door, and then the display showed 'Power' so I hit the [display] button. One push of the display button immediately displayed all four tire pressure values. I cranked up the engine and drove the car around for 5-10 minutes and all four tire pressure values displayed just like normal. Obviously the cooler temperatures (50° now) which I thought may have had something to do with the tire pressures not displaying had nothing to do with the problem.

It's fixed! I hope! Don't know how or why! Knock on wood...that it stays fixed. I thought I was going to have to get rid of the car because I despise with a passion when stuff doesn't work as it should. I have no clue why this particular process suddenly caused the display to start showing the tire pressure values again.

ItzFilyO

I'm telling u man, ur sensors are on their way out and need to be replaced. Especially for u, all 4 will need to replaced at once.

charley95

This has happened on my 18 only to have the readings reappear after a minute or so. It's only happened twice that I recall since I bought it in November of 17.

bclexus

Well, the display for tire pressure is back to just dashes (---) again!

H2O

In the 4GS I have found that if a single sensor malfunctions (e.g. low battery) then all you will see are dashes for all four tire pressures. Discount Tire can possibly diagnose it for you.

bclexus

Well, it's back to working normally again. I've driven the car 4 or 5 separate times and each time the tire pressure values displayed just as they are supposed to - worked perfectly. I can't explain what may have caused the glitch. Maybe it will continue to be normal.

fuddyduddy

Mine started to do this here when it got colder out.

bclexus

Interesting! I drove the car a few different times today and the first time I drove it I had no tire pressure values displaying, just dashes (---) and that was from the warm garage where it was about 70°. The last two times I drove the car the tire pressure values displayed perfectly and the ambient temperature was about the same.

I started out thinking that the ambient temperature may have had something to do with the strange behavior, but I'm not so sure because it wasn't like it was really cold the first time I drove the car today...plus all four tire pressure values either display, or they don't, so their batteries can't all be failing at the same exact time. Mysterious!

I'd be interested to know how yours performs over the coming days...

drgrant

This is useful to know, I know on my set of wheels with the fake TPMS sensors (or whatever they are) one of them shows up in carista and the others do not, yet I have 4 dashes for busted sensors on the panel, so this makes sense...

-Mike