I'm not following. The original equipment Denso TMPS (made for Denso by Pacific Industrial) Toyota PN 42607-30060 installed in Toyota and Lexus vehicles at the factory is a 315 MHz sensor. I think the OE Denso and the Discount Tire Dill # PCF1218 315 MHz TPMS sensors used for the Lexus GS 350 are both products made by Pacific Industrial

What would be the difference between the 315 MHz TPMS sensors that will successfully display tire pressures on the dash versus the 315 MHz TPMS sensors that won't display pressures on the dash?

Do you know which 315 MHz TPMS sensors won't show actual pressures on the dash?

 

Be mindful that you have a 2013, same as I. Apparently these early models are picky-picky, which is why I went with the Pacific Industrial models I linked.

 

Yes, he does have a 2013 GS like you do, which if his TPMS sensors are the original sensors installed they will likely to be at, or very near the end of their life.

I think the early models are likely finicky due more to their age than any issue with the onboard equipment (e.g. transponder, Electric Key/TPMS ECU module). However, I've often wondered if built-up dirt/crude on any one of the four antennas may impair the signal which makes dashes (- - ) display on the dash. I know cold weather on aging TPMS sensors will often trigger dashes (- - ) instead of tire pressures.

 

I heard that some TMC products are very picky, so will not accept aftermarket TPMS ID codes - hence aftermarket TPMS must be "programmable" so that existing original old OEM TPMS ID's can be "cloned" into new aftermarket programmable TPMS sensors for smooth operation.

 

2013 and on take the same sensor. There is something different in the oem style sensor that allows it to show the pressures on the display. Very few aftermarket work. Even though you scan any 315 sensor and it will show on the scan too or on TechStream they don’t all show on the dash. . Not all 315 are the same. Use this chart to take a look at different years/ models. Sometimes the difference in OEM part numbers is only a change in the angle the valve stem comes out the sensor, but on our GS it’s different internally.




https://www.dillvalves.com/tpms-look....&yr=2020%20(L)

 

For anyone that wants to know how old their Pacific Industrial made TPMS sensor batteries are.

If the TPMS sensors were made by Pacific industrial (for Denso or repackaged and offered by Dill, provided by Toyota/Lexus or Discount Tire, etc.):





The above TPMS sensor has a date code of '13C19' which means this particular TPMS was built in year 13 (= 2013), of month C (= December), on day 19 (=19th).

[This particular TPMS was manufactured on December 19, 2013 and had the original equipment battery installed on that date]

 

Entering a 2013 Lexus GS into the data chart produces this:

 

I know that when I had this issue, I specifically told/asked DT to NOT clone my sensors on the car because it wasn't working right, and to instead program fresh. And I think that's what they did. I think they probably got the process right (though that's why I passed out the phone number of the DT I frequent and the contact I worked with), but yeah aftermarket sensors are a poison pill for the system potentially. And since the OEM sensors are under 50 bucks each (as I linked), that means they are cheaper than many aftermarket options (DT had several for ~$60 for instance), Firestone tried and failed to fix it with what they swore would work with an aftermarket solution, and that left me with at least one aftermarket sensor when I bought new wheels and decided to try and solve this properly. I had a lot of assumptions from other cars and TPMS and that all needs to be thrown out with Lexus (and Toyota certain years, I suppose). I sure am glad I got it solved though, I am obsessive about keeping my tires properly inflated (years of selling tires as a young guy will do that), so starting the car and seeing those numbers just feels good, slightly reduces my anxiety that I'm GTG before I pull out to drive. The little things!

 

So your previous experience with aftermarket cloned programmable TPMS sensors did not work?
What make and model were they?

I installed aftermarket programmable Autel sensors 4 months ago.

I had the choice between:
1) Cloning old TPMS ID's from the vehicle's TPMS ECU into the new aftermarket programmable sensors.
2) Eyeballing and manually typing in the new aftermarket ID's into the TS508WF handset, then uploading via OBD II port vehicle's TPMS ECU.
3) Wirelessly reading new aftermarket TPMS ID's and uploading via OBD II port to vehicle's ECU.
4) The TS508WF handset can "auto-generate" a notional ID and program that into the aftermarket programmable Autel TPMS sensor, then upload that auto-generated notional ID via the OBD II port to the vehicle's ECU.

To keep it simple KISS, plus after hearing The Car Care Nut say that TMC TPMS ECU's did NOT like aftermarket TPMS ID codes, I chose option 1 to clone, by connecting the TS508WF handset to the OBD II port to download the four old original TPMS ID's already stored in the vehicle's TPMS ECU, and then inserting the new aftermarket TPMS into the TS508WF handset's TPMS receptacle to program the old cloned ID's into the four new aftermarket programmable sensors - and it has been all smooth running since then.

Below, the TS600's are higher end, but the TS601 is old, while the TS608 is new but now in tablet format.
The TS500's are midrange, the TS501 being old, while my TS508 is current.
The TS400's are entry level, with TS401 old, while TS408 the current model.
The newer models have a larger TPMS receptacle, though the old entry level TS401 and the new TS608 tablet have no TPMS receptacles.
The newer handsets have much quicker CPU's too.

The TS601 was higher end with more features, but it was a dated model with a slow processor, so I didn't buy it.
Meanwhile, the TS608 tablet and beyond was overkill for me; you could spend thousands of dollars on OBD II port handsets, tablets and laptops.
I have no time to gloss black vinyl wrap my 2015 front bumper into a spindle grill look, nor paint my callipers red, nor wire my brakes lights so that all four rear LED's light up - let alone play with all the TS608 tablet's features.
I will have to pay an auto electrician to get 4 rear brake lamps, because I find the two tiny rear brake lights the cheapest looking aspect of my 2015.

 

@lexo98 - Your Dill link produced an OE Sensor Part Number: 42607-02030 (see above), but according to Lexus dealerships the correct OE Toyota PN for the 2013-2020 Lexus GS is 42607-30060 (see below). A bit confusing...

 

There are so many parts that get superseded and updated I wouldn’t worry to much about what it says the oem sensor is. They are marketing their replacement that is the Dill 1218

 

I'm still confused about your belief that some TPMS sensors operating at 315 MHz frequency won't work with a 4GS. I can't imagine why some work, and some won't... The only possible differences I see in various 315 MHz TPMS sensors is the slight variance of the accelerator circuit that triggers the sensor to turn itself on, the sensor's signal strength, and how often the sensor transmits its signal - - but in my view none of these conditions should prevent any 315 MHz frequency TPMS sensor from working with the 4GS.

Your thinking that "the Lexus ECU doesn’t make sense" I guess goes along with what you've found that not all 315 MHz frequency TPMS sensors are the same. I would like to know how they differ and why some work and some won't work - not showing tire pressures on the display.

 

Unfortunately it’s not a belief it’s a fact. Oddly enough it was only 50degrees here this morning and I got all dashes with no tire light. I’ll update what I find.

 

​​​​​​
In a YouTube video, The Car Care Nut was saying how TMC ECU's will only accept genuine OEM TPMS ID codes, and they may not accept non-genuine TPMS ID batch codes.

 

I find it extremely hard to believe that's really correct. Considering there are a gazillion Toyota and Lexus vehicles on the road that have had the original genuine OEM TPMS sensors replaced by an untold number of tire dealers, car centers and auto shops all over the globe - that makes no sense to me. I seriously doubt that all of those multiple tens-of-thousands of TPMS replacement occurrences used only genuine OEM TPMS sensors to be sure the ID codes would be accepted by the vehicle's receiver ECU key an TPMS module. Do you?

Do you happen to know what is actually considered 'genuine OEM TPMS sensors? Would that only be TPMS sensors made available from Toyota Motor Company through Toyota or Lexus dealer's parts departments?

Call me just a tiny bit bigtime dubious about what the Car Care Nut said about this. I'm personally not fond of the Car Care Nut...