XSeries-forum

Eh Up All

Last week my Tyre Pressure Light came up RED on the dash for no reason - never had a problem with it before. It came up whilst going round a roundabout, just for info.

To be sure checked all TPs and they were fine.

I reset by holding the TPS button on the console and the light went out.

No light has come back up since, BUT, can some one please check the ignition sequence for me on start up.

I am positive that when i used to start up:-

Ignition position 1 - no TPS Amber check light
Ignition position 2 - TPS Amber light shows, (as i recall it does as a check) then for a second turns RED, then goes out. I could sware it never turned RED then went out, just Amber then went out ????

Start and drive car no TPS warning at all - so no issue.

I might be completely wrong its just im now aware of the sequence and can find nothing to check against.

I have serached on here and know how the system works (Thanks Horizon)


The system works via the traction control system / wheel sensors. When you reset the system, by pressing and holding the dash button until it goes amber, then it monitors how the wheels rotate and distance covered over a set time/ distance and saves this info.
When the rolling circumference changes due to the tyre deflating it flags up the red light.
So if you reset the system with the incorrect pressures it takes that as the norm. It doesn't monitor pressure but rolling circumference. So always reset after the correct pressure is put in to the tyres.

And i appear to have no problems but its bugging me about the RED check light on start up.

Appreciate anyone confirming the actual light sequence,

Cheers all

My E53 used to do this at rare but random intervals and I never found an issue with the pressures either.  Getting it to go out just needed the button pressing whilst rolling at less than 10mph or do. 

I thought that it cycled through Red > Amber > Out on self test during the start sequence, but only if the warning lights were allowed those few seconds to complete their checks.  It was very quick though.

X5sport

Cheers for that, definitely checked mine again now.

Starts Amber > Red briefly,> Amber then out.

I just want to put my mind at rest it always did that, probably never noticed and it’s a coincidence!!!

Anyone else check theirs and let me know

Thats....what mine did

Marti,

Nice one mate