We've got a 2009 TSX Tech and yesterday the wife told me the TPMS warning came up for the right rear tire. So I check it in the morning (we're in California so its not 12 outside) with a very good hand gauge and it looks maybe a pound or two low. But then I compare my reading to the readings on the instrument panel and my readings are off by 2-3 pounds on each wheel.

I ended up having to inflate the tires to what my gauge said was 35 or so to get the TPMS to read 33.

Anyone else seen this? Which should I believe?

 

Always trust your own tire gauge (assuming it is working properly).

My Canadian model display in kpa instead of psi, but all tire gauges from auto parts store display in psi... But my own experience with the TPMS is that the display is usually 1-2 psi lower than actual, so I think yours is fine.

 

how do i get it to show the psi per tire? all it says is tire pressure ok

 

Click on the ^Info button until you see the tire pressure OK display, then press the middle SEL/RESET button and they will show the psi of all four tyres.

 

weird i filled mine to 33 psi got in my car and my tpms said 33...

 

The TPMS is accurate at times. I've noticed it to not work properly in cold weather at all!! So trust in your handy dandy tire pressure gauge to be on the safe side.

Quick Questions!

If I rotate my tires, is there anything that has to be done to the TPMS?

Also are the TPMS sensors located within the tire/rim or on the car?

Thanks in Advance!

 

Yes, I keep my regular (digital) tire gauge in the car. In Canada, the readings are in kpa and not psi.

No, you don't have to do anything to TPMS when you do tire rotation, although you may to adjust tire pressure if you have higher pressure in the front than rear as most people do.

TPMS sensor is mounted inside the rim, the receiving unit is inside the wheel well.

 

THere is a sensor in each wheel that measures and transmit the pressure and there is a "receiver/trigger" in each wheel well that receives the signal from each sensor mounted inside each wheel. it queries (or triggers) the pressure sensor when you turn on the ignition and at set intervals when driving.

It detects when you rotate tires and when you change tires (e.g., winter/summer tires) so you don't need to go to the dealer and pay $$$ to have the new sensors re-programmed in the computer.

 

Thanks for the replies!

I've recently rotated the tires for $10 bucks at a spot I trust cause all the dealerships a were asking for $65.

 

My cars gauge seems to match my cheapy digital tire gauge.

 

Haven't had any accuracy issues so far...tpms matches the readings on my digital gauge.

 

$65 to rotate tires? Are you kidding me? Jesus.. Just pull out your spare and rotate them yourself.

My dealership rotates tires for free

 

Maybe you guys can help me out and it's probably a question you all know the answer too. I have my own rims that i want to put on the 2010 TSX but i'm not sure if i have to transfer the tire sensors or not. I'm assuming that i do. I don't want to put the other rims on and have the TPMS system screaming error at me.

 

^
Yes, you have to transfer them. Or, get a new set of 4, so that you won't have to bother with mounting/unmounting tires. BTW, Sean, nice .

 

OP, I've had 2 different sets of TPMS, and they both have been within 1psi of the true psi, according to my digital tire pressure gauge.

 

^Yes you do, or the dreaded TPMS system Error will show up on your MID. Transfer the sensors over if you don't plan on keeping the stock rims, otherwise go and purchase another set of sensors from the dealer.

 

Nice. Thanks for the help. I liked the days when there weren't sensors in the wheels and you could just change out anytime.