Odd Tyre Pressure Warning

rhud

Active Member
Joined
Jul 3, 2010
Messages
225
Was driving my w169 A Class yesterday and out of the blue got a big red 'Check Tyre pressures' warning on the display. All tyres looked ok,pressures normal. Then asked to reset pressure warning system which I did and went on my way. Anyone had anything similar?
 

grober

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Jun 22, 2003
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Perth, Scotland
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W204 C200CDI Estate
If the car doesn't have discrete internal tyre pressure sensors then its likely it relies on the ABS wheel speed sensors to monitor wheel rotational speeds - a tyre that's going flat will have a different rolling radius from the others showing up as a speed difference which the system flags up as a potential flat tyre.
 

PobodY

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Aug 23, 2016
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Stoke-on-Trent
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CLK350 Sport, Nissan GTiR
On mine the tyre(s) is rarely completely flat, but one or more of them might be lower than the others.
 

Harrythedog

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Had it before on a motorway roadworks section. Put it down to the uneven road whilst crossing the contra-flow
 

PobodY

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CLK350 Sport, Nissan GTiR
Had it before on a motorway roadworks section. Put it down to the uneven road whilst crossing the contra-flow
Ironically roadworks on the M6 are almost always when my warning pops up. - I think the low profile tyres are more prone to loss from knocks.
 

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