I just installed 4 new Toyota 42607-33022 sensors. When resetting, the tire symbol blinked 3 times, then the it went into reset mode.
Then it showed Low Pressure even though I had 34 lbs. in each tire. I took a 15 mile ride and nothing changed. Guess I'll drive her for
a while and hope that it corrects itself.
Any thoughts?

 

Did you program the sensors' IDs in the car with Techstream?

 

When you intall Tpms they do not automatically work, they all need to be registered. You need a scan tool or a techstream if you have it. You will need to register each tpms serial number thats located on the tpms itself. Its super easy if you have the scan tool and the serial numbers.

If you didnt record the numbers then what many big chain tire shops or dealer. Have a tpms scanner, where they can pick up the tpms sensor info simply by pointing the unit against the tire. When they retrieve the serial numbers then with the scan tool they can register them.

I wish you told us before purchasing instead of paying you can buy denso brand for $32 each sensor, basically its like oem

 

PauloFR, Thanks for your response. As much as I read about replacing the sensors, I never knew they needed to be
programmed to work. I'm not surprised because everyone wants to get into our wallets. Thanks for letting me know this.

 

ibidu1, Thank you for your response. I thought I did my homework. I read several posts about replacing and resetting the sensors.
I broke the beads and replaced the sensors myself. When resetting it did blink 3 times and then showed 'low tire'.
Never heard about having to be programmed. Just another ploy to get their hands into our wallets. Luckily I only paid $44 for the set.
I will go up the street to have them programmed by my tire place. Thanks again.

 

The denso sensors aswell mention self programming, I knew that it was BS and that they needed to be registered. From what I understand is all sensors are registered, if they werent registered and say you park next to a similiar make n model as your car, then your monitoring system will register the car next to you.

$44 for a full set of oem sensors or each sensor? If for a full set were they brand new? I would be wary of super cheap purchase, you may want to make sure you didnt buy a knock off. If there true oem you got one killer deal

 

If resetting, means pressing the button under the dash, then that is incorrect. There is a lot of false information on the web about this button.

Only way to do this is techstream or a tpms programmer.

 

Actually yes, it resets the system in a way it will attempt to detect the sensors again, or make the "LOW TIRE" message go away faster. After having my sensors replaced, the shop told me to hold the button while the car is on for 20 minutes, and it worked, no more warning.

It just won't detect sensors whose IDs are not programmed into the computer.

 

What you did is you set a new threshold value. Not reset the system. The button is designed for you to use a value that differs from the vehicle placard. If you want 30-32PSI in your tires, for example, when the system is programmed for 34-36PSI, the threshold value for the low tire light is about 6-8 PSI from the programmed value. Your tire light will come on. To overcome this, the button is there for you to set your preferred value. So you can put 30-32PSI and the low warning light will come on at a new threshold of 22-24PSI.

I took the Lexus technical training class when I worked at a dealership and this is one of the most misunderstood system out there.

 

Interesting never knew you can adapt new values, I figured it always stayed at that desired air psi range

 

OK but we can say it resets the threshold values in this case, because it sets them again I remember now seeing them in Techstream. I think they should be higher than 8 psi below the recommended pressure because by the time a tire reaches 8 psi below, it could already be worn out a bit more because of under inflation.

 

New sensors are either cloned for easy replacement or new id which need to be programmed back into ecu or have ecu relearn all new id with another tool.

 

Our system is not like the newer toyota/lexus. Any sensor you add new or old, the serial number needs to be typed and registered into the ecu. Newer cars sensors systems you are able to easily program without needing techstream or a good mechanics scan tool, but our system isnt like that.

There was one instance a guy purchased an aftermarket sensor, and in the instructions it mentioned that you didnt require programming. But it was not the case! Thats, why its best to snap pics of each sensors serial numbers to have it ready for whoever programs the ecu

 

The no programming TPMS is BS.

New TPMS will be either fixed serial # type or blank clone you can clone old number or make new id.

With clone type you copy old # into new sensor and switch them out.

With new serial # type TPMS you either use a tool to re enter all numbers including the old 3 numbers plus new one.

With Techstreamyou re enter all 4 ID numbers back into system.

Other aftermarket tools they force system to relearn all numbers but you already did a scan and its in the tool memory, it reloads them in for you.

Also there are times the serial # printed on the TPMS is not the same as what the scanner or car ECU see. So take pic of whats printed and compare what you see on scanner side.

 

Can you use any scan tool to reset the new sensors ?