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#1
12-06-2011, 07:42 AM
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Erroneous Tyre Pressure Indication
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#2
12-06-2011, 10:25 AM
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I'm having the same issue after changing my CV boot and brakes. TwinsPappa just put on his snow tires and experienced what we had and he let me know what he did in my thread "Got my V8!"
I'm going to try his system today and see if it works. Good luck!
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"I can’t understand it. I can’t even understand the people who can understand it" Queen Juliana (1909-2004), of the Netherlands "If you choose not to decide, you still have made a choice!"  2004 X5 4.8is Imola Red-228K ZF-GA6HP26Z-Sold 2006 X3 3.0i Mystic Blue-175K, ///M pkg 6-Spd Manual- Trading in 6/10/17 for a Mini too! 2003 Silver X5 3.0- sold 2000 VW Beetle 1.8 turbo-165K- Totaled 9/11/16
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#3
12-06-2011, 12:19 PM
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Side issue, but why would you have your tires at 43 psi? Doesn't seem at all safe to me.
__________________
2007 X3 3.0si, 6 MT, Premium, White Retired: 2008 535i, 6 MT, M Sport, Premium, Space Grey 2003 X5 3.0 Steptronic, Premium, Titanium Silver 2002 325xi 5 MT, Steel Grey 2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue
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#5
12-06-2011, 05:22 PM
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Thanks Big J will check it out.
The tires weren't cold when I got the warning. I got the warning after a couple of hours driving. When I say safe I believe 43Psi for a hot tire is a pretty safe......... no?
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#6
12-06-2011, 07:49 PM
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You're definitely at the upper end of the "safe" limit. The ride must be terrible.
Hot tires will typically read two to four psi higher than cold. I have 18" wheels on my 2006 X5 4.4i and run 35 psi cold. Also, when checking, make sure that your tire pressure gauge is accurate!!!
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#8
12-07-2011, 03:09 AM
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Should be closer to 32 psi, all tire sizes, unless you are carrying four people and a full load of luggage. Then the owner's manual says to take the rears up to 39, but to keep the fronts at 32. 20" tires do not require higher pressures. That is from my 2003 model owner's manual, not sure what year you have but it should be similar.
Too high a pressure is definitely not safe. And if you have moisture in the air from the compressor, you will get more variation than if the air is dry, as it is the moisture that expands more so than the air as the tire heats up. The sensors are seeing a variation between tires, not just a low pressure, so too high a pressure in one tire could cause the sensor to go off as well. Suggest you set all tires to 32 psi cold (or 35 if you insist) and then see if you continue to get nuisance warning lights.
__________________
2007 X3 3.0si, 6 MT, Premium, White Retired: 2008 535i, 6 MT, M Sport, Premium, Space Grey 2003 X5 3.0 Steptronic, Premium, Titanium Silver 2002 325xi 5 MT, Steel Grey 2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue
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#9
12-07-2011, 03:12 AM
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Quote:
 . Will be interesting to see if that gets rid of the alertThanks Andrew
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#10
12-07-2011, 02:31 PM
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Hey Andrew,
The page belwo is from my 2006 Owner Manual. Make sure your tires are cold before adjusting them. As JCL mentioned moisture content in the tire plays a big role in expansion. Some of those underground pumps that you find in your local gas stations have very high moisture content. If you use them I suggest letting the air out for a while before you actually fill up your tire. In some cases, you can actually see water drips from the air hose. And that’s why I bought a small air pump long time ago. I usually check the tire pressure once a month when the car has been parked over night. Good luck, Ashkan 
Last edited by Ash977; 12-07-2011 at 02:41 PM.
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