TPMS Accuracy - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

l008com · 02-23-2010, 03:30 PM

How accurate is the TPMS? Mine said all four of my tires were at 30psi. So I got out my pump and hooked it up, but according to the pumps gauge, the tires were all at about 35. So I pumped them up to what looked like about 39 or 40 on my pump, but showed on my dash as 35psi. Who should I trust? I don't have any other gauges to test by.

Inspector 17 · 02-23-2010, 03:32 PM

Mine have proven to be very accurate on both the Camaro on our Enclave. I checked them both with several gauges just to be sure.

Michael_Js · 02-23-2010, 03:35 PM

Mine are almost off by 2-3 psi - and not in one direction! Each one is a little different and I don't trust them at all. After I wash my Baby, and then use my air compressor to get the rest of the water out, I go around and check the tires for 36 psi.

I only use the DIC as a gross estimate check...

hypurone · 02-23-2010, 03:36 PM

Have you tried resetting the TPMS system? Mine is very accurate....

Switch over to the TPMS screen on the DIC and press the reset (at the end of the left stalk) the screen should change view to say it is resetting. Mine didn't start updating until I started rolling down the road (I upped my pressures from the 32 the dealer had to 36)

Michael_Js · 02-23-2010, 04:00 PM

Yup, reset them very recently since I put on new wheels...

Right after filling them to 36 psi - using an accurate gauge, 1 reads 37, 1 reads 35, 1 reads 34 and maybe 1 36. After a day or 2, they get a little further apart - in both directions. After a week or so, next wash, they are usually 1 lb low each (by gauge, not DIC)...like I said, I use the DIC as a guide and do my normal to take care of the pressures...

hypurone · 02-23-2010, 04:45 PM

Michael_Js,

Sorry, my reply was to the OP and the quote for him didn't get included.... odd tho. I did mine once and it has been sweet ever since.

Nine Ball · 02-23-2010, 05:03 PM

TPMS sensors do not update instantaneously, they review the air pressure in different time cycles. Tire pressure is also very sensitive to outside air temperature, as well as wheel temperature after being driven. Simply parking one side of the car facing the sun will change your air pressure. I've found TPMS sensors to be very accurate, within 1 psi. It is the tire pressure that varies quite a bit, depending on conditions.

Michael_Js · 02-23-2010, 05:27 PM

Quote:

Originally Posted by hypurone

Michael_Js,

Sorry, my reply was to the OP and the quote for him didn't get included.... odd tho. I did mine once and it has been sweet ever since.

No problem...

camaro1 · 02-23-2010, 10:40 PM

make sure to use a nice digital gauge to set the tire pressure, it should match the gauge pretty close.

02-23-2010, 03:30 PM	#1
l008com Drives: 2013 1LT Crystal Red/Beige Manual Join Date: Nov 2008 Location: Stoneham, MA Posts: 720	TPMS Accuracy How accurate is the TPMS? Mine said all four of my tires were at 30psi. So I got out my pump and hooked it up, but according to the pumps gauge, the tires were all at about 35. So I pumped them up to what looked like about 39 or 40 on my pump, but showed on my dash as 35psi. Who should I trust? I don't have any other gauges to test by. __________________ FS: 245/50R19 Snow Tires

02-23-2010, 03:35 PM	#3
Michael_Js SoCal C5 Family Member Drives: 2010 Camaro SS/RS - Black w/IOM; 6M Join Date: Jul 2009 Location: San Diego, CA, USA Posts: 5,298 View My Garage	Mine are almost off by 2-3 psi - and not in one direction! Each one is a little different and I don't trust them at all. After I wash my Baby, and then use my air compressor to get the rest of the water out, I go around and check the tires for 36 psi. I only use the DIC as a gross estimate check... __________________ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~ 2010 Black 2SS/RS; 6M; IOM, GFX, sunroof; ADM Race CAI; Zoomers CB; Viper Alarm; Pdaft F&R sways, Adj Endlinks, Rtrailing arms, Camber kit, strut brace, Front Trailing Arm Bushing; SLP Skip-Shift Elim; Tinted lights/windows; Hurst Short-throw; LoJack; Door & Dash ABL Mods; ********; JBA Shorty headers; AACStyle LEDs; Stillen DS rotors, Hawk Ceramic pads; Havoc Blk Chrome wheels: 20x9s; Lingenfelter Blk Al Pedals; RevXtreme Catch Can; Goodridge SS lines; Ported TB; RK Sport hood; Hotchkis chassis brace; KW V3 coilovers;

02-23-2010, 03:36 PM	#4
hypurone I'm not totally useless.. Drives: ... Join Date: Sep 2009 Location: ... Posts: 2,008 View My Garage	Have you tried resetting the TPMS system? Mine is very accurate.... Switch over to the TPMS screen on the DIC and press the reset (at the end of the left stalk) the screen should change view to say it is resetting. Mine didn't start updating until I started rolling down the road (I upped my pressures from the 32 the dealer had to 36) __________________ "You were really flyin' when I passed you back there!" - Born on 10/05/09 MyCamaroBuildInfo

02-23-2010, 04:00 PM	#5
Michael_Js SoCal C5 Family Member Drives: 2010 Camaro SS/RS - Black w/IOM; 6M Join Date: Jul 2009 Location: San Diego, CA, USA Posts: 5,298 View My Garage	Yup, reset them very recently since I put on new wheels... Right after filling them to 36 psi - using an accurate gauge, 1 reads 37, 1 reads 35, 1 reads 34 and maybe 1 36. After a day or 2, they get a little further apart - in both directions. After a week or so, next wash, they are usually 1 lb low each (by gauge, not DIC)...like I said, I use the DIC as a guide and do my normal to take care of the pressures... __________________ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~ 2010 Black 2SS/RS; 6M; IOM, GFX, sunroof; ADM Race CAI; Zoomers CB; Viper Alarm; Pdaft F&R sways, Adj Endlinks, Rtrailing arms, Camber kit, strut brace, Front Trailing Arm Bushing; SLP Skip-Shift Elim; Tinted lights/windows; Hurst Short-throw; LoJack; Door & Dash ABL Mods; ********; JBA Shorty headers; AACStyle LEDs; Stillen DS rotors, Hawk Ceramic pads; Havoc Blk Chrome wheels: 20x9s; Lingenfelter Blk Al Pedals; RevXtreme Catch Can; Goodridge SS lines; Ported TB; RK Sport hood; Hotchkis chassis brace; KW V3 coilovers;

02-23-2010, 04:45 PM	#6
hypurone I'm not totally useless.. Drives: ... Join Date: Sep 2009 Location: ... Posts: 2,008 View My Garage	Michael_Js, Sorry, my reply was to the OP and the quote for him didn't get included.... odd tho. I did mine once and it has been sweet ever since. __________________ "You were really flyin' when I passed you back there!" - Born on 10/05/09 MyCamaroBuildInfo

02-23-2010, 03:32 PM	#2
Inspector 17 I love crepes Drives: 2017 ZL1 NGM A10 Join Date: Oct 2008 Location: Maryland Posts: 4,955 View My Garage	Mine have proven to be very accurate on both the Camaro on our Enclave. I checked them both with several gauges just to be sure.

02-23-2010, 05:03 PM	#7
Nine Ball Drives: 1969 & 2016 Camaro SS Join Date: Oct 2008 Location: Houston, TX Posts: 3,849	TPMS sensors do not update instantaneously, they review the air pressure in different time cycles. Tire pressure is also very sensitive to outside air temperature, as well as wheel temperature after being driven. Simply parking one side of the car facing the sun will change your air pressure. I've found TPMS sensors to be very accurate, within 1 psi. It is the tire pressure that varies quite a bit, depending on conditions. __________________ Fquick.com/NineBall

02-23-2010, 10:40 PM	#9
camaro1 Drives: 550+RWHP 2010 camaro Join Date: Sep 2007 Location: wisconsin Posts: 1,588	make sure to use a nice digital gauge to set the tire pressure, it should match the gauge pretty close. __________________ 415ci stroker, TVS 2300 Magnacharger, cnc heads, cam, yank ss3200 converter, Kooks long tubes, Bwoody true cold air kit, ZL1 Pump, magnaflow 3" cat-back, lowering springs,BMR control arms and tie rod bars, 3.73 gears, diff mounts, RX can, ADM fuel controller

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