When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Recently I swapped all season tires with a new set of winter wheels and tires. The tire shop provided me with a set of aftermarketAutel (not sure about the exact model) programmable TPMS sensors. They copied the sensor IDs from my all season tires and cloned to the winter tires.
After the job was done, everything worked perfectly. All four tires show their PSI readings. However after running for about 1 month and 500KM, the PSI readings disappeared, all it shows are four double dashs ”--”.
I took the car to the tire shop, they checked the sensors and all of them are working fine - they are sending signals and can be picked by their TPMS tools. I also bought a carista ODB II box and the PSI numbers are indeed captured by ECU. Only thing is that the PSI numbers don’t show up in the dash. The tire pressure warning light is NOT on though.
Tire shop programmed it again, and I drove it for 40KM and it still doesn't show PSI numbers.
The strange thing is that
The Autel sensors worked for a month, and then the dash decides not to read from those sensors.
ECU is communicating with the sensors, but the dash doesn’t show PSI numbers.
One thing I suspect is that maybe the shop puts the sensor IDs in a wrong order (maybe I’m wrong and I indeed need OEM sensors). ECU knows the four IDs and their PSI numbers, but the dash has to figure out which ID belongs to front left, which ID belongs to rear right etc... In other words, how does the car know which ID belongs to which position?
And this is what carista shows - PSI numbers are indeed captured by ECU. ECU reads PSI from sensors
Car is 2017 IS 350 F-Sport. I’ve scheduled a service with a local Lexus dealer to find an answer, but I still have some hope that it is a program issue, not because of the aftermarket sensors. Any clue will be helpful, thanks!
If you want to have the pressures display consistently without issue, then you'll need OEM sensors.
With aftermarket sensors it seems a complete hit or miss if they will display the pressures.
Some display the pressures fine for a while then stop. Some don't display the pressure at all, and some display the pressure after a certain time. It's really all over the map.
The vehicle still gets the pressure readings from the sensors, so that is why the warning light is not on. If a tire goes low the warning light will come on for sure, but you won't know which wheel has the issue until you actually check the pressure of each wheel.
The vehicle can detect the sensors regardless of where they are, so it doesn't matter where they were cloned to or installed to, the vehicle will find them.
On early TPMS systems, back at the turn of the century position of the sensor on the vehicle was critical, but not now.
If you want to have the pressures display consistently without issue, then you'll need OEM sensors.
With aftermarket sensors it seems a complete hit or miss if they will display the pressures.
Some display the pressures fine for a while then stop. Some don't display the pressure at all, and some display the pressure after a certain time. It's really all over the map.
The vehicle still gets the pressure readings from the sensors, so that is why the warning light is not on. If a tire goes low the warning light will come on for sure, but you won't know which wheel has the issue until you actually check the pressure of each wheel.
The vehicle can detect the sensors regardless of where they are, so it doesn't matter where they were cloned to or installed to, the vehicle will find them.
On early TPMS systems, back at the turn of the century position of the sensor on the vehicle was critical, but not now.
You can't reuse OEM sensors in aftermarket wheels?
If you want to have the pressures display consistently without issue, then you'll need OEM sensors.
With aftermarket sensors it seems a complete hit or miss if they will display the pressures.
Some display the pressures fine for a while then stop. Some don't display the pressure at all, and some display the pressure after a certain time. It's really all over the map.
The vehicle still gets the pressure readings from the sensors, so that is why the warning light is not on. If a tire goes low the warning light will come on for sure, but you won't know which wheel has the issue until you actually check the pressure of each wheel.
The vehicle can detect the sensors regardless of where they are, so it doesn't matter where they were cloned to or installed to, the vehicle will find them.
On early TPMS systems, back at the turn of the century position of the sensor on the vehicle was critical, but not now.
Thanks Sasnuka! Very informative! Ordered OEM sensors and called the tire shop, they will replace the aftermarket sensors with OEM ones when it arrives.
Although the aftermarket sensors can still trigger warnings when the pressuer low, I guess I'm not the only guy who wants to see real-time PSI number on the dash.
You can't reuse OEM sensors in aftermarket wheels?
I have two sets of tires, one for summer and another set for winter. I can pull out the sensors from summer tires and use them in the winter. But typically in the north (Canada), we keep two sets of tires.
You can't reuse OEM sensors in aftermarket wheels?
Sure you can...maybe not every aftermarket wheel though...you have to look at the mounting surface on the rim.
I've had my OEM sensors on Vertini's and now my GTS wheels...I changed the installation kit for the sensor after I moved them from the Vertini's...the kit is the gasket, washer, and nut.
Sasnuke, from what I've heard the 2021 is now using part number 42607-53020. Can you confirm this?
It doesn't look like the online catalogues have 2021 IS yet. For the 2021's I found some vehicle that used that number, but the IS wasn't among them...but that could simply be because the 2021 IS isn't loaded yet into the same catalogue.
Maybe @Jeff Lange can help us out here with a part number confirmation.
Update:
Bought OEM sensors (parts number 4260730060), brought car to tire shop, changed with the OEM sensors and re-programmed. All PSI values showed up right away.
TPMS not show real-time values
