Tyre losing pressure

diystarter7

Hi OP
How old is the car, the mileage, make and model and alloys  ?

Thanks

Ectophile

It could be a puncture.  Or a leaky valve.  Or the tyre is badly fitted to the rim.  Or the rim is damaged.

A good independent tyre fitter should be able to work out which it is.

baser999

EssexExile said:

baser999 said:

Perhaps it’s the actual pressure fitting on the wheel itself that’s the problem? Tried switching it on to another wheel and see what happens? 

I got the impression from the OP that the car didn't say which tyre was low, so there won't be a "pressure fitting" on the wheel. I may have got the wrong impression of course.

I don’t have TPMS and assumed that it indicated precisely which wheel was affected. I’ve leant something

strawb_shortcake

baser999 said:

EssexExile said:

baser999 said:

Perhaps it’s the actual pressure fitting on the wheel itself that’s the problem? Tried switching it on to another wheel and see what happens? 

I got the impression from the OP that the car didn't say which tyre was low, so there won't be a "pressure fitting" on the wheel. I may have got the wrong impression of course.

I don’t have TPMS and assumed that it indicated precisely which wheel was affected. I’ve leant something

No, the car isn't that clever, it's only on manually checking the tyres that we work out which one it was. 

Lorian

Most likely a screw or nail and facade hit it on the head. Expect to wait a while it takes about 20 mins if it's in a fixable part of the tread.

facade

baser999 said:

I don’t have TPMS and assumed that it indicated precisely which wheel was affected. I’ve leant something

Some systems do. You'd think they were better, but actually, for moneysavers they are not. They have an expensive pressure sensor inside each tyre- it is part of the valve.  They have (non-replaceable) batteries and the recommendation is to replace them when you change the tyres.

Better (from our point of view) systems simply look at the wheel speeds, and if one is consistently faster than the others assume that tyre is flat and flag a warning. (there is no reason why they can't indicate which wheel it is though....)

Ganga

I had the same on one of my front wheels ,Vauxhall Astra 54 plate , one tyre fitter tried everything to locate leak went back after a few months and a different fitter found the fault ,leaking between rim and tyre ,when i had a new tyre fitted they wire brushed the rim first and put on some black sticky stuff first ,been great since ,back wheels doing it now 

sheramber

Could be the valve leaking. A new valve sorted my son's leaking tyre

strawb_shortcake

I'm taking the car in tomorrow morning, the chap I spoke to said the valve is a common issue on a Ford so suspects it that. 
Will update tomorrow 

chrisw

annabanana82 said:

I'm taking the car in tomorrow morning, the chap I spoke to said the valve is a common issue on a Ford so suspects it that. 
Will update tomorrow 

A dab of spit on the end of the valve is the usual test for this. They can also leak where they pass through the alloy but rarely.