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Hey all, I recently had new wheels and tires installed on my GS along with new TPMS sensors. Used a TPMS tool to get the ID’s off the sensors and uploaded them to the car. All is well. I used techstream to confirm the correct ID’s and everything lines up. The problem is that the dash isn’t showing the PSI and shows —. What could be the issue?
I took it for a short 10 minute drive and tried the reset button under the dash. Nothing.
(attached a picture showing the computer reading the sensors)
Mine has been pretty spotty since day 1 of purchasing the car used. On warmer days, it's better, but on most days it doesn't display. Adjusting the wheel PSI using the TSB values seemed to help... but then again, it's also gotten warmer since then so I don't know if bringing the PSI down helped or if its just the warmer weather.
Older sensors have the tendency to not show pressures in lower temperatures until the batteries completely die out. In your case though, what sensors (exact brand/ model) did you install?
Older sensors have the tendency to not show pressures in lower temperatures until the batteries completely die out. In your case though, what sensors (exact brand/ model) did you install?
Schrader 29112 as then the densos were still out of stock.
Hey all, I recently had new wheels and tires installed on my GS along with new TPMS sensors. Used a TPMS tool to get the ID’s off the sensors and uploaded them to the car. All is well. I used techstream to confirm the correct ID’s and everything lines up. The problem is that the dash isn’t showing the PSI and shows —. What could be the issue?
I took it for a short 10 minute drive and tried the reset button under the dash. Nothing.
(attached a picture showing the computer reading the sensors)
EAST once said that the process of deflating and reinflating the new tires takes a lot of energy capacity from the TPMS sensors.
Hence, often we end up with the sticky situation where the TPMS appears faulty or even won't work after a set of new tires - so the owner often thinks that the tire shop technician did something wrong.
To prevent these situations, it is best for tire shops to warn customers prior to changing tires, that the process of deflation and reinflation uses a lot of battery, so the TPMS may play up after a deflation and reinflation of a new sets of tires.
Pity TPMS sensors are so small and simple that there is no way of determining the remaining battery capacity percentage - other than the fact that it is usable or flat.
My Autel TS508 Wi-Fi will only tell me if the battery is good or flat; it won't actually tell me the remaining battery percentage.
Though I don't think it is the handset's fault.
To determine the actual remaining battery percentage, the TPMS sensor would have to constantly emit remaining battery percentage signals - which would drain even more limited battery power!
Hence, once age is up, and battery capacity is down, the TPMS no longer emits a signal as frequently for pressure, hence no dash pressure display.
Best to find out which sensor has low battery levels, and better still - replace all the TPMS simultaneously.
Can use genuine Lexus OEM at a cost.
Or use Denso who supply Lexus.
Or use aftermarket TPMS sensors which often have programmable ID codes to clone your original ID codes.
EAST once said that the process of deflating and reinflating the new tires takes a lot of energy capacity from the TPMS sensors.
Hence, often we end up with the sticky situation where the TPMS appears faulty or even won't work after a set of new tires - so the owner often thinks that the tire shop technician did something wrong.
To prevent these situations, it is best for tire shops to warn customers prior to changing tires, that the process of deflation and reinflation uses a lot of battery, so the TPMS may play up after a deflation and reinflation of a new sets of tires.
Pity TPMS sensors are so small and simple that there is no way of determining the remaining battery capacity percentage - other than the fact that it is usable or flat.
My Autel TS508 Wi-Fi will only tell me if the battery is good or flat; it won't actually tell me the remaining battery percentage.
Though I don't think it is the handset's fault.
To determine the actual remaining battery percentage, the TPMS sensor would have to constantly emit remaining battery percentage signals - which would drain even more limited battery power!
Hence, once age is up, and battery capacity is down, the TPMS no longer emits a signal as frequently for pressure, hence no dash pressure display.
Best to find out which sensor has low battery levels, and better still - replace all the TPMS simultaneously.
Can use genuine Lexus OEM at a cost.
Or use Denso who supply Lexus.
Or use aftermarket TPMS sensors which often have programmable ID codes to clone your original ID codes.
I installed 4 NEW sensors not even 3 weeks ago, the sensors are being read by the ECU (I checked with techstream and they’re showing the PSI). The issue is the dash still reads —.
I installed 4 NEW sensors not even 3 weeks ago, the sensors are being read by the ECU (I checked with techstream and they’re showing the PSI). The issue is the dash still reads —.
Were the sensors OEM arm and leg, or Denso, or other aftermarket brands?
Unfortunately, aftermarket brands will often work, but NOT display pressures.
I recently had new sensors installed 2 weeks ago. Purchased the Denso sensors from Rock Auto, I had them installed at Mavis Tire with no issues. They come preprogramed and Mavis just needed to do a relearn which is to update the new serial numbers to the cars computer. The new sensors are all working.
If you purchased new sensors and learned them to the vehicle and the tire symbol light turns off but no pressures after driving you have the wrong sensors. Same thing happens when the OEM sensors get old and it’s cold out.
Schrader 29112 as then the densos were still out of stock.
I see.
The Shrader 29112's are compatible with GS, but like most aftermarket sensors, they will not display tire pressures on the instrument panel.
Only aftermarket Denso's have full pressure displays, because TMC buys from Denso.
TPMS not reading on dash
