2012 Tundra - couple of questions

Truck is new to me. It has almost 160k on it. Since having the truck I've noticed a couple of things that I'm unsure of.

The tire pressure light stays on. I've checked all 4 tires and the are good. I've added air to see if I could get it to go off. If went up to as much as 45 PSI and it's still on. Is that a thing with this year truck? Is it possible that the light comes on because there's TOO MUCH air in the tire? I wouldn't think so but I'm not sure. They are a 35" tire.

Twice now, the anti-lock brakes have kicked in for just a second or two under light braking on dry pavement. Pads are in great shape and the rotors are smooth. Anyone have any experience with that? It seems random but it's never under hard braking or slippery conditions.

Anyone?? Thanks in advance for reading and helping out.

 

It sounds like your tpms warning threshold is too high. Fill your tires to the pressure you want a warning for. The button under your steering column resets your tpms threshold to the current tire pressures. Then fill your tires to your desired operating pressure.

 

There's a reset button ?? Never knew that. My light had been on forever. I'll have to try that this morning.

 

You may have a bad tpms sensor(s). (They will "wear out" after several years.) If they're original that may be the issue. My light would do the same. Replaced all 4 sensors a few years ago and has been working properly since.
Not sure on the ABS issue.

 

Your abs issue may be caused from a stuck caliber not working. My truck was bought with stuck front driver caliber and driver rear brake.no signs of wear on those 2 brakes. Changed them out and haven’t had the abs issue since.good luck.

 

If they are original sensors, the batteries are most likely dead. They average 8 to 10 years at most.

 

Yep...dead batteries.

 

One or more of the sensor batteries is dead. They last about 8 to 10 years.

 

If you're comfortable, might be worth looking at your abs sensors for either impact damage or even loose bolts. Check the wiring for any damage as well.

My TPMS light was on for over a year after install of new tires and (Toyota$$) sensors even tho the originals were still functioning. The techs at Pepboys just couldn't figure out why the light wouldn't turn off and had to refund what they charged for instal. Went to Discount tires a couple weeks back, and they had the sensors paired in under 5 minutes free of charge.

I will be returning to Discount for all of my tire needs.

As others have said, if the sensors are original, the batteries on one or all are probably dead. Aftermarkets are available, but I opted to pay over $300 for 4 sensors thru Toyota.

 

You said you have 35" tires so I'm assuming aftermarket wheels also? Do you know if there are tpms sensors installed? If you don't know then get somewhere that has a tpms scanner and verify. That can also determine if any are bad if they are there.
Many places will install new sensors in new wheels and tires but fail to read and copy the original sensor id's to the new sensors. So the tpms light will remain on.

 

You don't need a scanner to see if TPMS sensors are installed.

 

No you don't... But you do need the scanner to see if they are working properly ...
TPS sensors will be with a metal valve stem... Rubber valve stems means no sensors...

 

Just because the stems look like sensor stems doesn't make it so. Also I have 3 vehicles with rubber valve stems. All have sensors. 2 ways to verify. Scanner or dismount and look.

 

The batteries are inside the sensor? What kind of batteries are they?

 

Yes and they are not replaceable. They are epoxy sealed as well.

 

Apparently the TPMS sensor will light up if your pressure is too high as well? I had sensors replaced with a new tire set. Inflated to 38psi, light kept staying on. Took it back to tire shop, said it can light up if pressure is high. He took some air out and the light went away. Thought it was BS...but it worked. This was for aftermarket sensors.

 

Yeah, I read an article that said that when I was researching how to troubleshoot and fix it.

Finally got fed up and decided the light will just need to keep on gracing my dashboard.