TPMS reading off - Page 2

HDRDTD · 07-11-2017, 11:29 AM

Keep in mind that the TPMS does not measure the psi instantaneously. I'm not sure just how often it updates, But you do have to drive it a bit until the readings update.

The learning tool is about the size of a pack of cigarettes, and can usually be bought for around $40-50.

Or, my local dealer will re-learn my sensors for free in about 5 min, no appointment needed, no cost at all. Just drive in, get'r done, drive away.

Frank237 · 07-11-2017, 02:42 PM

Quote:

Originally Posted by HDRDTD

Keep in mind that the TPMS does not measure the psi instantaneously. I'm not sure just how often it updates, But you do have to drive it a bit until the readings update.

The learning tool is about the size of a pack of cigarettes, and can usually be bought for around $40-50.

Or, my local dealer will re-learn my sensors for free in about 5 min, no appointment needed, no cost at all. Just drive in, get'r done, drive away.

Bought my relearn tool on E Bay...made in China of course. IIRC $39 and a few bucks for shipping. Worked PERFECTLY the first try.

My nearest Chevy Dealer is 40 miles away. And they are bums. Didn't buy my car from them either. Which seems to be an issue with them. Easier to do it myself.

CWOFOR · 07-12-2017, 07:35 AM

Thank you all. This has been very helpful & informative. And since I will be doing rotations from now on, purchasing the tool will pay for itself. Thanks again.

RCF · 07-12-2017, 08:23 AM

Quote:

Originally Posted by CWOFOR

I recently took my '16 1SS in for an oil change and rotate. Prior to this my tire pressure monitor system and my air pressure gauge matched up perfectly. Upon getting it back from service, the two no longer match, the TPMS reads 2 psi less than the gauge (consistently)

Correct me if I'm missing something, but I don't think relearning the TPMS positions is going to correct any offset between the sensor and your gauge.

I'm not being a partypooper, just have one that reads 2-3 psi low myself (per my gauge and dealer's gauge), and was curious if there was any "fix".

talon90 · 07-12-2017, 09:17 AM

Quote:

Originally Posted by RCF

Correct me if I'm missing something, but I don't think relearning the TPMS positions is going to correct any offset between the sensor and your gauge.

I'm not being a partypooper, just have one that reads 2-3 psi low myself (per my gauge and dealer's gauge), and was curious if there was any "fix".

The OP's difference is between the reading of his TPMS on the DIC and his air pressure gauge.

If the OP is placing his air pressure gauge on the left front tire and taking a reading and then comparing it to a DIC reading for the left front tire that is actually coming from the right front tire because the dealer made a swap and didn't re-learn the new position to the car, it could.

JFM-jr · 07-12-2017, 10:06 AM

My sensors are always off a psi or 2 vs my Moroso gauge i never give it a 2nd thought

grampa_ss · 07-12-2017, 10:20 AM

Mine too. My gauge reads 2 lbs higher than my sensors.

Glen e · 07-12-2017, 10:30 AM

My 16 stock sensors in aftermarket wheels read a pound higher than my joe's race air gauge. It's OK with me because I just use the display indicator to tell me that I don't have a very low pressure situation. To get finite,I'll always use the gauge

ctrlz · 07-12-2017, 11:03 AM

From what I've read the TPMS piezoelectric sensors typically have an accuracy of +/- 1 psi. The typical pencil style tire gauges have accuracy around +/- 1 to 2 psi and can't be calibrated. The better gauges have a means of calibration.
My car reads 2 psi higher than the gauges I use, and that completely fits my expectations. Close enough given the constraints.

07-12-2017, 10:06 AM	#20
JFM-jr Drives: 2016 Camaro 2SS Join Date: Mar 2016 Location: Suffolk Long Island Posts: 954	My sensors are always off a psi or 2 vs my Moroso gauge i never give it a 2nd thought __________________ 2016 Hyper Blue 2SS A8,NPP,Moonroof Pray ported factory intake manifold Ported TB Rotofab ARH 1 7/8 longtubes hi flow cats AFM deleted E85 11.0@124.9 11.65@118.8 pump gas,stock tune/exhaust New combo: Pray Performance Heads/cam MSD intake manifold and Circle D 3C 554/491 on E85 all work & tuning done by Pray

07-12-2017, 10:20 AM	#21
grampa_ss Drives: 2016 Camaro 2SS Join Date: Apr 2017 Location: Stansbury Park, Utah Posts: 1,102	Mine too. My gauge reads 2 lbs higher than my sensors. __________________ 2016 2SS, MRC, NPP, A8. Procharger P-1X,Stage II,std bypass, 3.9, Alky Meth - 10.84 @129 - DA+2000 New Mods - GPI drop ins, Kooks 2", LT4 fueling, Cam, Circle D Converter, 3.5 pulley & dual nozzle meth.

07-12-2017, 10:30 AM	#22
Glen e Retired from Car mfrs.... Drives: 2LT RS/HR-V Join Date: May 2013 Location: /Fort Lauderdale Posts: 10,044	My 16 stock sensors in aftermarket wheels read a pound higher than my joe's race air gauge. It's OK with me because I just use the display indicator to tell me that I don't have a very low pressure situation. To get finite,I'll always use the gauge __________________ Glen CLICK HERE for detailing a new car: detailing for non detailers CLICK HERE for how to rinseless CLICK HERE for EASY wheel sealant

07-11-2017, 11:29 AM	#15
HDRDTD Drives: 2013 Triple Black ZL1 Vert M6 ECF Join Date: Mar 2011 Location: Trenton, Michigan Posts: 7,046	Keep in mind that the TPMS does not measure the psi instantaneously. I'm not sure just how often it updates, But you do have to drive it a bit until the readings update. The learning tool is about the size of a pack of cigarettes, and can usually be bought for around $40-50. Or, my local dealer will re-learn my sensors for free in about 5 min, no appointment needed, no cost at all. Just drive in, get'r done, drive away.

07-12-2017, 07:35 AM	#17
CWOFOR Drives: '16 1SS Join Date: Dec 2016 Location: Menominee, MI Posts: 71	Thank you all. This has been very helpful & informative. And since I will be doing rotations from now on, purchasing the tool will pay for itself. Thanks again.

07-12-2017, 11:03 AM	#23
ctrlz Drives: 2017 2SS, 50th pkg, M6, MRC, NPP Join Date: Jan 2016 Location: Ocean City, NJ Posts: 3,558	From what I've read the TPMS piezoelectric sensors typically have an accuracy of +/- 1 psi. The typical pencil style tire gauges have accuracy around +/- 1 to 2 psi and can't be calibrated. The better gauges have a means of calibration. My car reads 2 psi higher than the gauges I use, and that completely fits my expectations. Close enough given the constraints.

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