E85 tyre sensor warning

[TrickyDicky]

On the way to the Kent cruise this morning, my tyre sensor light came on. Checked the pressures at the start of the cruise and they were spot on. How do they work? My only theory is it was very cold this morning and I'm only a couple of minutes from the A2, so was quickly up to 70 (honest officer :evil: ) Would the sudden increase in tyre temperature and maybe slight size (expansion) trigger them somehow? Not sure how they actually work

 

[bradmarsh1989]

Set your tyre pressure to the correct PSI... then hold the button for 3 seconds until it goes orange, drive off for around 30seconds and the tyre pressure sensor willa dapt to the new PSI in your tyres and your good to go.

 

[buzyg]

I believe they measure the speed of rotation of the wheels. If the corresponding wheels, on either side of the car, are rotating at slightly different speeds, then the computer assumes the pressure is low, in one of the tyres and brings the warning lights on.

 

[Ste]

I always thought they check how fast the wheels are rotating in relation to road speed? Not sure where I got that from mind.

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[TrickyDicky]

Thanks guys, still odd that it should suddenly go off' but I did adjust the pressures last night (they were a few PSI too high after having the wheels refurbed a few weeks ago) so I guess it could be that. Presumably if there really was a problem it would come back on quickly after a reset?

 

[Ste]

Thanks guys, still odd that it should suddenly go off' but I did adjust the pressures last night (they were a few PSI too high after having the wheels refurbed a few weeks ago) so I guess it could be that. Presumably if there really was a problem it would come back on quickly after a reset?

Yeah it just happens sometimes. Even a pothole in the road can set it off. Best bet is to visually check all is ok on all four tyres then reset it and drive on. If it goes off again then it's worth a closer look but if not forget it (well, might be worth checking all the pressures next time you're at a garage).

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[srhutch]

Thanks guys, still odd that it should suddenly go off' but I did adjust the pressures last night (they were a few PSI too high after having the wheels refurbed a few weeks ago) so I guess it could be that. Presumably if there really was a problem it would come back on quickly after a reset?

You should always reset the system after adjusting pressures. Thats probably what set it off.

 

[Georgio]

Funnily enough I had mine go off recently after I had the wheels refurbed; checked at home and they'd stuck in too much pressure.

 

[bcworkz]

Best bet is to visually check all is ok on all four tyres then reset it and drive on. If it goes off again then it's worth a closer look but if not forget it (well, might be worth checking all the pressures next time you're at a garage).

Umm - sorry, I don't entirely agree. I would not reset immediately as a visual check is entirely inadequate for verifying correct pressure, and completely useless with runflats. By resetting, you are telling the system the pressures are correct, which you cannot know by visual inspection. It is most definitely not something to forget about.

I would still do a visual inspection just to be sure it is reasonably safe to continue driving, but not reset the light. The next morning, I would check/adjust the pressures in all tyres, and only then reset the system. If driving with the light on drives you crazy you can reset it prematurely, but do not forget to properly check and reset the system the next morning.

 

[Ste]

Best bet is to visually check all is ok on all four tyres then reset it and drive on. If it goes off again then it's worth a closer look but if not forget it (well, might be worth checking all the pressures next time you're at a garage).

Umm - sorry, I don't entirely agree. I would not reset immediately as a visual check is entirely inadequate for verifying correct pressure, and completely useless with runflats. By resetting, you are telling the system the pressures are correct, which you cannot know by visual inspection. It is most definitely not something to forget about.

I would still do a visual inspection just to be sure it is reasonably safe to continue driving, but not reset the light. The next morning, I would check/adjust the pressures in all tyres, and only then reset the system. If driving with the light on drives you crazy you can reset it prematurely, but do not forget to properly check and reset the system the next morning.

Yeah I agree entirely that you should check properly once you get to a garage, what I meant is it'll do no harm resetting the light once you've checked all is ok to continue, if anything it'll help monitor the tyres don't drop again if you do continue driving whereas if you just leave it and continue driving you don't know if you're losing more pressure or not. Didn't word it particularly well i didn't mean forget it as such.

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