I got a low tyre pressure warning the other day after having 2 new front tyres fitted. When I checked the Bolero system it showed all 4 tyres in red.

 

Is this how the system should behave?  I would have thought it would only show suspected tyres in red.

 

After checking the tyres and not finding any problems I did a recalibration. Since then everything has been OK

Think it's a limitation of the indirect tpms system: http://www.my-gti.com/321/volkswagen-tyre-pressure-monitoring-system-tpms

I got a low tyre pressure warning the other day after having 2 new front tyres fitted. When I checked the Bolero system it showed all 4 tyres in red.

 

Is this how the system should behave?  I would have thought it would only show suspected tyres in red.

 

After checking the tyres and not finding any problems I did a recalibration. Since then everything has been OK

when you had the tyres replaced you may have had the fronts and rears rotated.  In any case as the pressures were different to what the car was expecting you need to recalibrate them.  They system doesnt measure pressure, it measures a change in the tyres behaviour based on a loss of pressure.

I got a low tyre pressure warning the other day after having 2 new front tyres fitted. When I checked the Bolero system it showed all 4 tyres in red.

Is this how the system should behave? I would have thought it would only show suspected tyres in red.

After checking the tyres and not finding any problems I did a recalibration. Since then everything has been OK

Also, the infotainment highlights all the tyres irrespective of which one it is etc. Just like it highlights the fuel tank when the needle is in the red

On mine, the Maxidot tells me which tyre is concerned, e.g. rear, left.

If you get the warning, and it shows all four tyres as being red then its more than likely a system error. Best practise would be to check the tyres anyway, and then reset the system.

 

If one tyre goes down, it does tell you which one on the screen. I've got a slow puncture on my rear left and every so often the car tells me (I do check and then re-inflate the tyre)

 

The system works through wheel speed using the ABS wheel speed sensor, rather than a special valve etc. So swapping wheels could cause an error if they have slightly different pressures or wear.

Edited 22 April, 201610 yr by meb90

Just as an aside on this, I got both nearside tyres flashing up as losing pressure halfway down the A1(M) on a journey to Wales last summer. I bricked it as the car had just had a major service (main dealer, warranty) and so I 'knew' it couldn't be a natural loss in pressure. Moreover given the problem was showing on the infotainment screen as being nearside only, I assumed both wheels had gone over the same sharp object.

 

Fearing the worst, pulled into the services and all four tyres were well under the recommended pressures - I'm talking more or less half a bar all round. Thought it was my pressure gauge so tried the one on the air machine, same result. Inflated the tyres to the pressures inside the filler flap, reset the TPMS and drove on (which was incidentally like driving a different car due to the effect on the handling). All hunky dory for the next year.

 

Moral - check your pressures after a service! Unless I'm being thick I can't see why they might have been under-inflated on purpose.

As a suggestion, get all the tyres to the correct pressure using a gauge you know to be accurate and then re-set the TPMS.