Faulty tpms sensor?

[treyk]

I switched wheels and noticed that after driving for some time all of the tpms sensors were reading except for one. I am not getting a tpms light and scanned the car with my Ktuner and didn’t see anything. Is there a way to reset the system or am I just unlucky and got a faulty one. I’ve driven maybe 10 miles so far.

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[jayy_swish]

Release the air in the tire under 27psi see if the low tire light comes on for that wheel.

if it comes on sensor is working and transmitting psi to the BCM and BCM isn’t telling the cluster the tire pressure or if the low tire light doesn’t comes on than either the BCM hasn’t memorized the tire sensor ID or the sensor itself is the issue.

 

[treyk]

Yeah I’m thinking it’s the sensor itself. I dropped the psi to like 25 and nothing came up so I drove a bit and the tpms light came on so I cleared it and it’s still the same.

Release the air in the tire under 27psi see if the low tire light comes on for that wheel.

if it comes on sensor is working and transmitting psi to the BCM and BCM isn’t telling the cluster the tire pressure or if the low tire light doesn’t comes on than either the BCM hasn’t memorized the tire sensor ID or the sensor itself is the issue.

 

[jayy_swish]

Light came on, but still not showing psi on the cluster ?

 

[treyk]

Light came on, but still not showing psi on the cluster ?

after I dropped it the light didn’t come on so I filled it back up to 35 psi and then after driving for like 25-30 min it looked like this

then I cleared the code and it went back to how it was in the first picture in the thread.

 

[jayy_swish]

Interesting that it flagged all tires, it should have only flagged the one (unless you lowered all tires under 27psi). What is it that is popping up that you are clearing ? You should not have to clear anything for the warnings to clear. All you need is the tire pressure to be above 27psi (have a working sensor obviously lol) and drive the car for at minimum 40 sec above 15mph and it should go away. If not a key cycle and a quick drive should correct it. Where are the sensors from? Are they OEM?

 

[treyk]

42753-T3R-A04 From ebay. They look the same as the ones PRL sells on their site.

When the light came on and all the tires looked like that it was already after a good amount of driving and was totally random. I didn't have my laptop with me but tunerview allows you to check and read codes from the phone so I checked and it didn't pop with any codes at all so I just hit clear. And after hitting clear it just went back to how it was before with just the one tire at the front left not reading.

Interesting that it flagged all tires, it should have only flagged the one (unless you lowered all tires under 27psi). What is it that is popping up that you are clearing ? You should not have to clear anything for the warnings to clear. All you need is the tire pressure to be above 27psi (have a working sensor obviously lol) and drive the car for at minimum 40 sec above 15mph and it should go away. If not a key cycle and a quick drive should correct it. Where are the sensors from? Are they OEM?

 

[jayy_swish]

I haven’t tried using ktuner to read codes but I’m pretty sure it only reads check engine light codes, you would need a scanner that could read all the modules in the car to access TPMS stuff

 

[treyk]

Ah that would make sense why I couldn't see it. Ill get my hands on a better scanner but in the meantime I contacted the seller to see if I can get an extra one sent. Will update once I fix it.

 

[jgaffney]

I have a similar situation on my bone-stock 2025 A-Spec with 9K miles on it. I went on a long drive (180 miles) with no problems. The next morning, the TPMS showed that I had low pressure in the right front. I got out the pump, connected it to the tire, and it showed 27 psi. I pumped it up to 32 psi just to be sure, I disconnected the pump and turned the ignition on. The TPMS still showed low pressure on the right front, but the screen showed 30 psi in the tire, with 28-29 psi in the other 3 tires. The next day, the dash didn't show any warnings at all. So, do I have a bad sender on the wheel or a bad receiver on the frame? Everything is still under warranty.

BTW, has anyone altered their car to carry a space-saver spare, a jack and a lug wrench? I don't like being stuck somewhere with just a pump and a can of sealant.

 

[Mr. LargeCoffee]

I have a similar situation on my bone-stock 2025 A-Spec with 9K miles on it. I went on a long drive (180 miles) with no problems. The next morning, the TPMS showed that I had low pressure in the right front. I got out the pump, connected it to the tire, and it showed 27 psi. I pumped it up to 32 psi just to be sure, I disconnected the pump and turned the ignition on. The TPMS still showed low pressure on the right front, but the screen showed 30 psi in the tire, with 28-29 psi in the other 3 tires. The next day, the dash didn't show any warnings at all. So, do I have a bad sender on the wheel or a bad receiver on the frame? Everything is still under warranty.

BTW, has anyone altered their car to carry a space-saver spare, a jack and a lug wrench? I don't like being stuck somewhere with just a pump and a can of sealant.

Do a search, lots of threads regarding a compact spare.
06421-3S5-A10 - TEMPORARY KIT
This kit contains a new piece of foam, tools, a rim and a valve. You have to buy the tire separately, I got a Continental spare at Discount tire.

 

[jgaffney]

I have read up more on the subject of the TPMS system and tire pressures. I bought a quality dial pressure gauge instead of relying on he cheapo stick gauge on some air pumps. This is what I've learned:

• The tire pressure printed on the sticker on the door jamb is a cold pressure. As in stone cold, undriven yet that day.
• The TPMS doesn't actually measure the air pressure in the tire, but rather the rolling radius of the wheel assembly. If it's short, the TPMS reports low pressure.
• The TPMS can be recalibrated from options on the screen. See this YouTube video:
  

Do the 40-series low-profile tires lose air faster than a 60- or 70-series tire?

 

[Mr. LargeCoffee]

Bullet number 2 is wrong. That’s how “Indirect” TPMS works. No actual sensor in the wheel, revolutions per time are counted, if the wheel has more revolutions than predicted based on the last “reset” of the system then the TPMS light will come on. An old Matrix that my wife had used this type of system. The Integra has a sensor in each wheel that does indeed measure the pressure.

 

[jgaffney]

LargeCoffee, thanks for the correction.

 

[Mr. LargeCoffee]

I probably didn’t explain very well. The link from discount tire does a better job.

https://www.discounttire.com/learn/tpms-info/tpms-facts

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