TPMS suddendly stopped working

I usually have issues after tire rotations, but everything has been working fine and the last rotation was a couple months ago.

Today it just started blinking and then steady on with no data for all four wheels.

Not sure why a fuse would go out for apparently no reason but even if it did I'm thinking other stuff would have gone too as I don't think there is single fuse for TPMS.

I suppose the whole system could go out, but is there a way to check that other than paying Toyota a bunch of money?

Thanks for any help.

 

From what I understand, if one TPMS goes bad, you'll get no pressures on all 4. At least thats been my experience for the past few years when a tire shop broke a TPMS and I never got it fixed. The truck is basically telling you it can't locate that sensor, and because it doesn't know its location, it won't display pressures. You can go to any reputable tire shop. Many have the ability to locate the bad sensor/read ID's without removing the tires, but the single bad wheel will need to have the tire removed/remounted to install a new single sensor. You don't have to replace all 4, just the 1 bad one. Tire shops will be able to program the new sensor using the existing sensor ID, or reprogram a new ID so the truck recognizes it, depending on the sensors/tools they use. Long story short, just visit a tire shop; you don't have to use Toyota.

 

Thanks. I didn't know a single bad one would kill them all. I'll head over to Discount and see if they can confirm a bad sensor or something else.

Hopefully that's it as I suspect getting the TPMS ECU or whatever brain is in there fixed would be expensive. Might have to return to caveman days and just start checking manually again.

 

For clarification, having 1 go out doesn't make the other 3 bad. Think of it like the battery died in one of them. Because the truck now can't communicate with that 1, it doesn't know the location of it, so it doesn't report the pressures of any of the 4 (even though the other 3 are working fine). Discount tire can definitely take care of you. Many of us just do the caveman method too, so its nothing urgent, unless you can't live with the light lol. My light has been on for years with a bad sensor. Figured I'd fix it next time I bought tires. The 'ole caveman visual inspection and tire kick hasn't let me down yet.

 

bad battery in one of them.

 

Well, on my way home the whole was working again so I don't know what's going on. Maybe it is a bad battery but warming up during the day allowed it work a bit better. Or gremlins.

 

If you do not have a scan tool that does TPMS, I would unhook the Negative battery cable for a minute to see if that clears up your gremlins.

 

8 years old in a cold climate

recorded and sent to the local authorities

 

Normal.
Your sensor batteries are at the end of life, mine has been doing this for the last few years as soon as the weather turns colder.

 

Mine stopped working just recently, then I got new tires. I had no interest in buying new sensors. I’m living with the light. Sometimes it flashes, sometimes it’s just on. Maybe someday I’ll get in there and tape over it.

 

If your tire pressure light is on steady, then you need to scan for codes. You will get a code that starts with C212x. The X will range from 1 to 4 to indicate the ID of the faulty sensor. These ID can be seen in Techstream. Kind of useless in many respects, but you can have the sensors scanned and the one that doesn't show up is the one that is bad. As others stated, it will need to be replaced and reprogrammed. You can program the new sensor to the tpms ecu with a handheld scanner or techstream.