Tire Pressure Sensor wrong
Team Owner
Joined: Mar 2008
Posts: 21,502
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From: Southern Utah
No, and its normal, as long as all the sensors are off by about the same amount. They are to be used to show a loss of pressure, not to accurately measure pressure.
If one sensor is off by more than the others, it could be bad, as any electronic device could be, but there is no calibration routine to adjust the sensors to be right on.
If one sensor is off by more than the others, it could be bad, as any electronic device could be, but there is no calibration routine to adjust the sensors to be right on.
Team Owner
Joined: Mar 2008
Posts: 21,502
Likes: 461
From: Southern Utah
Yes....what the sensor system is really good for is showing a loss of pressure in one tire. You click through the readings and it says 29, 29, 29, 25...but if it says 30, 30, 30, 29...its meaningless...depend on a good gauge for this.
Race Director
Joined: May 2006
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From: SOFLA
2016 Corvette of Year
2015 C6 of Year Finalist
Also, if they didn't put the pressure sensor back in the same location you won't get the correct reading either. If they put LR on RR for example. Your computer won't know unless you re program them.
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Race Director
Joined: Oct 1999
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From: Somers NY
If the sensors are just there to inform you if you are losing air in a tire etc... will you get a DIC message or code if your air pressure goes to high...
I prefer to run with 34 lb cold and the DIC shows 40 lb when tires are hot after driving 30 miles in the interstate..
Its not a problem now (getting cold here in NY) but in 90+ deg weather I'm thinking my tires will go to 42+ after a long drive at 70+ mph...
Will the car go into "Limp Home Mode"? or will I just get a message etc...?
Thanks
I prefer to run with 34 lb cold and the DIC shows 40 lb when tires are hot after driving 30 miles in the interstate..
Its not a problem now (getting cold here in NY) but in 90+ deg weather I'm thinking my tires will go to 42+ after a long drive at 70+ mph...
Will the car go into "Limp Home Mode"? or will I just get a message etc...?
Thanks
Safety Car
Joined: Aug 2000
Posts: 3,734
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From: Southeastern PA
I purchased a second set of wheels/tires/sensors for my 05. When my original tires wore down, I swapped the sets. My pressure would read fine in my garage then throw a XXX code (can't read pressure). It happens that the original set was stored in the basement, just below where the car sits in the garage. I was told the system was still reading the sensors from my original set then threw the code when on the road and pinged for them again. Ha.
Team Owner
Joined: Sep 2000
Posts: 25,009
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From: Far NW 'burbs of Chicago
St. Jude Donor '13
42 psi triggers a "xx Tire Pressure High" message but does not affect the rest of the car, I believe.
The OP's discrepency could be because the TPMS does not update immediately after adding/bleeding air, and it only updates about once per hour after the car has been shut down.
When mine have updated properly, they are within 1 psi of my several hand held digital gauges. This is true on our 2009, and was also true on our 2006 and 2001.
The OP's discrepency could be because the TPMS does not update immediately after adding/bleeding air, and it only updates about once per hour after the car has been shut down.
When mine have updated properly, they are within 1 psi of my several hand held digital gauges. This is true on our 2009, and was also true on our 2006 and 2001.
Team Owner
Joined: Mar 2008
Posts: 21,502
Likes: 461
From: Southern Utah
If the sensors are just there to inform you if you are losing air in a tire etc... will you get a DIC message or code if your air pressure goes to high...
I prefer to run with 34 lb cold and the DIC shows 40 lb when tires are hot after driving 30 miles in the interstate..
Its not a problem now (getting cold here in NY) but in 90+ deg weather I'm thinking my tires will go to 42+ after a long drive at 70+ mph...
Will the car go into "Limp Home Mode"? or will I just get a message etc...?
Thanks
I prefer to run with 34 lb cold and the DIC shows 40 lb when tires are hot after driving 30 miles in the interstate..
Its not a problem now (getting cold here in NY) but in 90+ deg weather I'm thinking my tires will go to 42+ after a long drive at 70+ mph...
Will the car go into "Limp Home Mode"? or will I just get a message etc...?
Thanks
PS, Jim may be right at 42psi...I just remembered 44...either way...its high...higher than 30 psi cold being driven fast on a very hot day.
Team Owner
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St. Jude Donor '05-'06-'07-'10
Are you sure that the tire shop put the sensors back in the same locations that they were in prior to the tire swap?
The Corvette has four unique ID tire pressure monitor sensors. One located in each wheel. Because they have unique id's that they transmit, they are location specific. If you move a sensor from say front left to rear left, when you get back in the car the DIC would display the front tire pressure when you brought up the rear reading.
If the same sensors are used on the car they must be returned to their original locations in order to get correct readings. My money is on the fact that they didn't pay attention to the location and that they didn't reset the monitors once they did this. The reset procedure is a five minute operation by anyone that knows what they are doing. I'd have this done before blaming the accuracy of the sensors. They may be off a pound at most.
Further, were you stationary when you checked the reading? The TPMS go in to a sleep mode and will only update once per hour. With temps changing the pressure can change a fair amount in an hour. They will wake up once the car is in motion and above a certain speed.
The Corvette has four unique ID tire pressure monitor sensors. One located in each wheel. Because they have unique id's that they transmit, they are location specific. If you move a sensor from say front left to rear left, when you get back in the car the DIC would display the front tire pressure when you brought up the rear reading.
If the same sensors are used on the car they must be returned to their original locations in order to get correct readings. My money is on the fact that they didn't pay attention to the location and that they didn't reset the monitors once they did this. The reset procedure is a five minute operation by anyone that knows what they are doing. I'd have this done before blaming the accuracy of the sensors. They may be off a pound at most.
Further, were you stationary when you checked the reading? The TPMS go in to a sleep mode and will only update once per hour. With temps changing the pressure can change a fair amount in an hour. They will wake up once the car is in motion and above a certain speed.
Last edited by talon90; Oct 9, 2009 at 01:02 PM.
Race Director
Joined: Oct 1999
Posts: 13,298
Likes: 14
From: Somers NY
Thanks..in the cool weather I'll be fine..... but in the summer I'll remember to lower the pressure to 30 lb if its HOT outside & I plan on a long trip...
Moderator
Joined: Feb 2006
Posts: 39,077
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From: DFW Area TX
According to the owners manual, you should get the high pressure warning if the pressure in any tire exceeds 42 psi.
HIGH TIRE PRESSURE: To acknowledge the warning,
press the RESET button. After you press the RESET
button, a message will reappear every 10 minutes until
this condition changes. This message indicates that
the pressure in one of your tires is higher than 42 psi(290 kPa).
Next to the HIGH TIRE PRESSURE
message, you can see either LEFT FRONT, RIGHT
FRONT, LEFT REAR, or RIGHT REAR to indicate
to you which tire is higher than 42 psi (290 kPa).
press the RESET button. After you press the RESET
button, a message will reappear every 10 minutes until
this condition changes. This message indicates that
the pressure in one of your tires is higher than 42 psi(290 kPa).
Next to the HIGH TIRE PRESSURE
message, you can see either LEFT FRONT, RIGHT
FRONT, LEFT REAR, or RIGHT REAR to indicate
to you which tire is higher than 42 psi (290 kPa).
Thread Starter
Intermediate
Joined: Dec 2008
Posts: 48
Likes: 3
From: Mckinney TX
Are you sure that the tire shop put the sensors back in the same locations that they were in prior to the tire swap?
The Corvette has four unique ID tire pressure monitor sensors. One located in each wheel. Because they have unique id's that they transmit, they are location specific. If you move a sensor from say front left to rear left, when you get back in the car the DIC would display the front tire pressure when you brought up the rear reading.
If the same sensors are used on the car they must be returned to their original locations in order to get correct readings. My money is on the fact that they didn't pay attention to the location and that they didn't reset the monitors once they did this. The reset procedure is a five minute operation by anyone that knows what they are doing. I'd have this done before blaming the accuracy of the sensors. They may be off a pound at most.
Further, were you stationary when you checked the reading? The TPMS go in to a sleep mode and will only update once per hour. With temps changing the pressure can change a fair amount in an hour. They will wake up once the car is in motion and above a certain speed.
The Corvette has four unique ID tire pressure monitor sensors. One located in each wheel. Because they have unique id's that they transmit, they are location specific. If you move a sensor from say front left to rear left, when you get back in the car the DIC would display the front tire pressure when you brought up the rear reading.
If the same sensors are used on the car they must be returned to their original locations in order to get correct readings. My money is on the fact that they didn't pay attention to the location and that they didn't reset the monitors once they did this. The reset procedure is a five minute operation by anyone that knows what they are doing. I'd have this done before blaming the accuracy of the sensors. They may be off a pound at most.
Further, were you stationary when you checked the reading? The TPMS go in to a sleep mode and will only update once per hour. With temps changing the pressure can change a fair amount in an hour. They will wake up once the car is in motion and above a certain speed.
Team Owner
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St. Jude Donor '05-'06-'07-'10
The tire size can go on a variety of vehicles, the maximum listed on the tire is the maximum safe inflation pressure but the Corvette shouldn't be anywhere near that level. Walt, I know you know this but I wanted to add to your statement for clarification of others that may be reading.
