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Tyre pressure warning.
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01-11-2012, 09:14 AM | #1 |
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Tyre pressure warning.
Hello guys. Looking for a bit of technical guidance again.
Got the other-half a 330M Sport (272bhp) last month and she (we) love it. The tyre pressure warning sign is coming on pretty regularly. The tyre pressure hasn't dropped but it comes on when-ever we (she) goes over poor road surfaces - and there are plenty of them around here at present. My question is: is this common or should I get it seen to? Thanks again, Colin. |
01-11-2012, 02:13 PM | #2 |
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Are you resetting the TPWS, after you check and/or adjust pressures?
Could be as simple as it needs a reset. HighlandPete |
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01-11-2012, 05:22 PM | #3 |
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+1
It works by seeing the diameter of the tyres change slighty, so as one goes flat it turns a bit faster than the one opposite. The computer registers that over a period of time, in a straight line, one wheel is rotating a bit faster than the other (it uses the ABS wheel sensors to do this) This is not nromal behaviour, but at Pete says a reset will likely cure it - see the manual. Ensure all cold tyre pressures are correct, reset it and drive away - as per the handbook. You can get grief too if you have odd tyres across one axle, or one is very much newer than the opposite tyre. One heats up a bit faster and 'bong' it registers it as a pressure difference (it really is until the other warms and catches up). I have had this a couple of times as the lease hire idiots leave me no choice about matching brands. Eventually I had to drive for an hour to warm then up and THEN reset the bloody thing, or else it would go off every morning after 20min!
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