Intermittent Low Tire Pressure warning
12-04-2013, 07:55 PM
#1
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Intermittent Low Tire Pressure warning
I have a 2000 Corvette. I get a Low Tire Pressure message soon after I start up and then intermittently during my drive. I had my electrical system checked out and everything is fine. I had the valve stems checked out and they are fine. What else could it be?
12-04-2013, 08:46 PM
#2
Team Owner
How much air pressure do you have in the tires, and how do you know? The warning will trip below 25lbs, cooler temps may be the issue if you don't know how much pressure is in each tire. If you get the warning when you have 30 lb s air in the tire, your only choice is a bad sensor in the tire. Which wheel is giving the low warning?
12-04-2013, 09:16 PM
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The codes are A0-LDCM B2282 H, A1- RDCM B2283 H, B AO LDCM B2284 H & A1-RDCM B2285 H. The tire pressure is correct. It alternates on which wheel is low. I had the sensors checked and they seem to be ok.
12-05-2013, 04:23 AM
#5
Team Owner
You still haven't said how much pressure you run in the tire. Are you saying also that alternates between all four tires? What pressure does it read on the DIC when the low pressure reading is displayed?
Your position seems to be it doesn't work, but nothing's wrong. Because of the way the sensor works with the RFA, the only thing that makes sense is that you don't have enough air in your tires. You may have a bad gauge. If you really want to troubleshoot the problem, try a different gauge, or add 2 lbs of air to all four tires and drive around a little. If it doesn't fix the problem you can always let it back out. If you're getting a reading, the RFA and the tpms are working. The tpms could be off, but to have more than one read the pressure incorrectly, intermittently is very unlikely. Without you providing information on how you know how much pressure is actually in the tires and what your DIC says is there, you're just going in circles. I don't know how you "had the tpms checked", the only check is do they read what the actual pressure is. And if they do, and you have enough air in the tires, you won't get a low tire warning alternating between tires. If you have actual pressure of mid twenties, you will get exactly what you describe. If you want help, give an answer to what it reads on the display, and how much is REALLY in the tire, with more than one gauge.
Your position seems to be it doesn't work, but nothing's wrong. Because of the way the sensor works with the RFA, the only thing that makes sense is that you don't have enough air in your tires. You may have a bad gauge. If you really want to troubleshoot the problem, try a different gauge, or add 2 lbs of air to all four tires and drive around a little. If it doesn't fix the problem you can always let it back out. If you're getting a reading, the RFA and the tpms are working. The tpms could be off, but to have more than one read the pressure incorrectly, intermittently is very unlikely. Without you providing information on how you know how much pressure is actually in the tires and what your DIC says is there, you're just going in circles. I don't know how you "had the tpms checked", the only check is do they read what the actual pressure is. And if they do, and you have enough air in the tires, you won't get a low tire warning alternating between tires. If you have actual pressure of mid twenties, you will get exactly what you describe. If you want help, give an answer to what it reads on the display, and how much is REALLY in the tire, with more than one gauge.
Last edited by 65GGvert; 12-05-2013 at 04:36 AM.
12-05-2013, 09:04 AM
#6
Team Owner
The OP says his car is a model year 2000. Unless the TPMS sensors have been changed sometime along the way, 13 year old sensors are quite possibly near the end of their life cycle.
12-05-2013, 09:05 AM
#7
Le Mans Master
Are the sensors originals from 2000?
If they are, you have been lucky that they are still working at all. Many start failing in about 7 to 10 year range. If they are originals, you probably need new ones.
Good luck.
If they are, you have been lucky that they are still working at all. Many start failing in about 7 to 10 year range. If they are originals, you probably need new ones.
Good luck.
12-05-2013, 10:54 AM
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thank you everyone. I really appreciate everyones input. On the tire pressure, I had them checked and filled by Costco Tire Department. They also checked the valve stems with a round magnet and they said that they were OK. I will try to add a few extra pounds to each tire and see if that helps.
12-05-2013, 11:34 AM
#10
Safety Car
You still haven't said how much pressure you run in the tire. Are you saying also that alternates between all four tires? What pressure does it read on the DIC when the low pressure reading is displayed?
Your position seems to be it doesn't work, but nothing's wrong. Because of the way the sensor works with the RFA, the only thing that makes sense is that you don't have enough air in your tires. You may have a bad gauge. If you really want to troubleshoot the problem, try a different gauge, or add 2 lbs of air to all four tires and drive around a little. If it doesn't fix the problem you can always let it back out. If you're getting a reading, the RFA and the tpms are working. The tpms could be off, but to have more than one read the pressure incorrectly, intermittently is very unlikely. Without you providing information on how you know how much pressure is actually in the tires and what your DIC says is there, you're just going in circles. I don't know how you "had the tpms checked", the only check is do they read what the actual pressure is. And if they do, and you have enough air in the tires, you won't get a low tire warning alternating between tires. If you have actual pressure of mid twenties, you will get exactly what you describe. If you want help, give an answer to what it reads on the display, and how much is REALLY in the tire, with more than one gauge.
Your position seems to be it doesn't work, but nothing's wrong. Because of the way the sensor works with the RFA, the only thing that makes sense is that you don't have enough air in your tires. You may have a bad gauge. If you really want to troubleshoot the problem, try a different gauge, or add 2 lbs of air to all four tires and drive around a little. If it doesn't fix the problem you can always let it back out. If you're getting a reading, the RFA and the tpms are working. The tpms could be off, but to have more than one read the pressure incorrectly, intermittently is very unlikely. Without you providing information on how you know how much pressure is actually in the tires and what your DIC says is there, you're just going in circles. I don't know how you "had the tpms checked", the only check is do they read what the actual pressure is. And if they do, and you have enough air in the tires, you won't get a low tire warning alternating between tires. If you have actual pressure of mid twenties, you will get exactly what you describe. If you want help, give an answer to what it reads on the display, and how much is REALLY in the tire, with more than one gauge.
Please ask the costco guy how much pressure is in each tire....
12-05-2013, 12:22 PM
#11
Le Mans Master
Even GM says you should not rely just on the TPS.
You need to check the tire pressures periodically with a good quality tire pressure gage.
I would never depend on a shop to get the pressures right.
You really need to check them after they have all equalized overnight, and then go from there.
You need to check the tire pressures periodically with a good quality tire pressure gage.
I would never depend on a shop to get the pressures right.
You really need to check them after they have all equalized overnight, and then go from there.
12-05-2013, 02:06 PM
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I am pleased and somewhat embarrassed. But, problem is solved. Costco checked my pressure and set them at 24 & 25#. I went to a Firestone dealer & he checked them and increased the pressure to 30 & 31#. That did it! And it didn't cost me anything.
Thank all of you for your input.
Thank all of you for your input.
12-05-2013, 03:07 PM
#13
Team Owner
I am pleased and somewhat embarrassed. But, problem is solved. Costco checked my pressure and set them at 24 & 25#. I went to a Firestone dealer & he checked them and increased the pressure to 30 & 31#. That did it! And it didn't cost me anything.
Thank all of you for your input.
Thank all of you for your input.
Don't you own a tire gauge???
12-05-2013, 04:40 PM
#14
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Stay away from idiots at Costco or any other box store tire "dealer". Learn how to do things for yourself if you're going to own a Corvette. That's the first thing I taught my sons early in their lives long ago. Get out your Owner's Manual and read it cover to cover. It will explain about tires, sensors, pressures, etc, plus a ton of other useful information. It's there for a reason. Your drives's door jam has a factory label that says 30lbs of air in a cold tires is recommended for a C5. After the tires warm up during a drive, the air pressures rises a bit, depending also on the outside air temp. I believe the DIC gives the low pressure warning when the PSI is below 26lbs of air pressure.
Get to know your car to help yourself. Good luck in the future.
Get to know your car to help yourself. Good luck in the future.
12-05-2013, 08:12 PM
#16
Team Owner
I am pleased and somewhat embarrassed. But, problem is solved. Costco checked my pressure and set them at 24 & 25#. I went to a Firestone dealer & he checked them and increased the pressure to 30 & 31#. That did it! And it didn't cost me anything.
Thank all of you for your input.
Thank all of you for your input.
12-05-2013, 11:20 PM
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Thank you very much for your help.
12-06-2013, 06:59 AM
#19
Team Owner
No problem, I'm just glad it was an easy fix for you.