Hello everyone

 

My 2019 Citigo had two new front tyres fitted in June due to low tread. The tyres were supplied and fitted by the Skoda dealer and are Continental EcoContact 6 (replacing EcoContact 4 or 5 fitted when new). The car has a slightly older EcoContact 6 on one rear wheel (fitted in 2022 without any problems) and one original tyre. Both rear tyres have decent tread. The four tyres all have the same size marking though the EcoContact 6 also say XL.

 

After the new tyres had been fitted, the tyre pressure light would come on after about 20 minutes. The pressures were checked and correct, so I would reset the button only for it to come on again.

 

The dealer took the car back, and said that they had done a 'hard reset' of the system which would cure it. It hasn't. I've now done 1000 miles on the tyres so would expect any 'new tyre issue' to have settled down by now.

 

It's going back again on Wednesday for further investigation.

 

I understand that the system is linked to the ABS and detects rotation, not actual pressure. The Citigo has no way of checking which tyre(s) is throwing up the error. Presumably there is either a problem with the pressure monitoring system, or the tyres fitted are not correct and the wheels are rotating at the wrong speed! (Although the rear tyre which is the same type did not cause these issues!)

 

I am wondering if the lone original tyre is now confusing the system.

 

If anyone else has had these issues or has any suggestions for how it can be resolved I would be pleased to have the information. Many thanks!

 

 

 

I've always considered that as it is reading the ABS sensors, it is just a "frequency driven" system, so if any tyre(s) are replaced, the system needs to be "reset" to recognise what a "good" situation looks like in terms of relative differing RPMs from all 4 wheels. It is only when one changes frequency that the alarm should get triggered to alert you to "an issue".

I think you need to stop the car, turn off the engine, then turn on ignition, then press the reset for it to "take", but if this has been done, one of the ABS sensors is going dodgy. There should however be an error code for this.  If not, there may be a fault with the steering angle sensor, which may need a reset, but which may not always report an error.

Thanks both.

 

I've done the in-car reset repeatedly over the last couple of months, and suspect this is all the garage did last time they saw it, so there must be something more fundamental going on! Thanks for the suggestion of the ABS sensors and steering sensors. I'll irritate the service desk by asking them to check these when i go in (again) on Wednesday.

 

In the scheme of things this isn't a major issue but it is a bit annoying having it constantly going off and the light coming on. If it can't be fixed I'd almost rather it be disabled as I do check the pressures regularly myself and would rather not have the constant false alarms. 

 

I'll report back especially if there is a fix which would help others.

 

On 14/09/2024 at 11:21, Citigo1982 said:

If anyone else has had these issues or has any suggestions

Have you checked ( carerfully ) that all the tyres are EXACTLY the same size.

 

Am presuming that when you check the pressures that one is not low.

 

Thanks. AG Falco

Edited 15 September, 20241 yr by AGFalco
spelling again.

They don't need to all be the same size. For example, the fronts are often higher pressure, and have a greater rolling diameter than the rears. Similarly if you change one damaged tyre for a new one, it also won't be the same size, but won't trigger a warming if you reset TPMS.. Once it is reset, it's the change that is detected, if a tyre deflates.

My money is on a flaky ABS sensor or (less likely) steering angle sensor (or possibly wheel alignment?)

Dealt with one car which had one tyre a different size from the other three which was tripping the TPMS.

 

Thanks. AG Falco

Was it an Up/Citigo with ABS-based TPMS? And what happened when you reset it?

 

My spare wheel (OEM) is a definitely a slightly different rolling radius to the other three tyres, and I have had occasion to use it. It triggers the TPMS system from the off, but resetting makes it work fine - no warnings.

Hi all - thanks for the replies. 

 

I went to the dealer this morning armed with suggestions about ABS and steering angle sensors.

 

The car is now back with me and has been 'fixed' (though this is what they said a month ago). Key points from what they have told me:

 

- Pressures all OK and no tyre damage. (I can add that the alignment was done when the tyres were changed 2 months ago.)

- Tyre sizes all correct; the fact that the remaining original EcoContact tyre doesn't say XL doesn't matter.

- Wheels all rotating evenly as expected

- ABS sensors are apparently fine; at least, no fault is showing

- The brake software is up to date.

 

They have done some sort of 'wipe' of the system and reinitialise. Apparently this is different from the 'hard reset' they did last time.

 

They tell me that the next 100 miles are 'calibration' so the light shouldn't come on during that time (unless there is actually a serious pressure loss). If it starts to come on again after 100 miles then ....????!

 

Unless I'm off on a big trip (when I can easily do 500 miles in a week), I do about 5 miles a week on average so it may be a while before we know whether they have succeeded this time!

19 hours ago, Citigo1982 said:

Hi all - thanks for the replies. 

 

I went to the dealer this morning armed with suggestions about ABS and steering angle sensors.

 

The car is now back with me and has been 'fixed' (though this is what they said a month ago). Key points from what they have told me:

 

- Pressures all OK and no tyre damage. (I can add that the alignment was done when the tyres were changed 2 months ago.)

- Tyre sizes all correct; the fact that the remaining original EcoContact tyre doesn't say XL doesn't matter.

- Wheels all rotating evenly as expected

- ABS sensors are apparently fine; at least, no fault is showing

- The brake software is up to date.

 

They have done some sort of 'wipe' of the system and reinitialise. Apparently this is different from the 'hard reset' they did last time.

 

They tell me that the next 100 miles are 'calibration' so the light shouldn't come on during that time (unless there is actually a serious pressure loss). If it starts to come on again after 100 miles then ....????!

 

Unless I'm off on a big trip (when I can easily do 500 miles in a week), I do about 5 miles a week on average so it may be a while before we know whether they have succeeded this time!

Whilst I hope you are now sorted thought I'd mention my experience with recurring tyre pressure alerts in a 2019 Mii.

 

I had recurrent tyre pressure alerts which I eventually realised were as a consequence of a drink, or more likely several being spilled, leading to the reset button becoming gummed up. 

 

After much tyre pressure checking I cleaned up the button with switch cleaner and no further issues 🤞

An update!

 

I used the Citigo for the first time today since the garage claimed to have fixed the tyre pressure light issue.

 

After driving for 15 minutes I reached a 70mph stretch of road - and the light came on. 

Reached my destination, allowed the wheels to cool, checked pressures (all fine), and reset the button in the car. Light went out and I set off.

 

As soon as I then got to another 70mph stretch of road, the light came on again.

 

I'll be phoning the garage on Monday. To recap, this light issue has only occurred since they fitted new front tyres, and thinking about it the warning only comes on at motorway speeds. 

 

If anyone has any further thoughts I'd be grateful. I'll raise the question of ABS and steering sensors again, though last time the garage said there were no fault codes showing.

So pressures set cold and checked again cold were OK, 

but.

 

Before having anyone checks it is best that you do.

When the TPMS comes on stop ASAP / when safe and carefully feel the Wheel Centre for heat.

Check the Tyre Pressure while hot, and see if one is particularly high. 

A binding brake or a bearing heating up the hub / wheel / air in tyre and expanding the tyre.

 

The TPMS does not just spot a reduced tyre circumference it can also cause an alert because the tyre has expanded much more. 

 

PS

Next 100 miles Recalibration is TOTAL BS from whoever.

You can put on a Spare Tyre / Wheel with any pressure and a slightly different circumference and reset the TPMS and within a mile a mile or 3 it should throw no warning.

Go get a new tyre or repair, reset the TPMS and again after running straight & going around a few corners again reset. 

Edited 5 October, 20241 yr by Ootohere

Allowed the wheels to cool? You mean they were more than slightly warm?

If "hot", get the tracking or alignment checked.

11 hours ago, freemansteve said:

Allowed the wheels to cool? You mean they were more than slightly warm?

If "hot", get the tracking or alignment checked.

 

Hi - not as far as I can tell. I just meant the usual thing about not checking pressures immediately after using the car as the reading would be inaccurate. 

The usual thing is set tyre pressures and reset the TPMS when the tyres are cold. (Cold is different high summer and deepest winter, out side compared to inside.)

So tyres checked regularlyt

 

But if you get a warning and stop and the tyres are OK and no obvious flat, and when checked pressures are OK then you really do need to check it was not an overheating issue causing the warning.

Just before having others doing checking, but if it is a sticky caliper or wheel cylinders / drums or bearings it is going to cost anyway.

5 hours ago, Ootohere said:

The usual thing is set tyre pressures and reset the TPMS when the tyres are cold. (Cold is different high summer and deepest winter, out side compared to inside.)

So tyres checked regularlyt

 

But if you get a warning and stop and the tyres are OK and no obvious flat, and when checked pressures are OK then you really do need to check it was not an overheating issue causing the warning.

Just before having others doing checking, but if it is a sticky caliper or wheel cylinders / drums or bearings it is going to cost anyway.

 

thanks - I'm planning to test this tomorrow (I don't use the car everyday)

 

I tried calling the garage to get them to take a third look but they say they have checked the sensors twice, there are no faults, so it's up to me to take a log of the mileages the fault occurs at and then to call back if it keeps happening!

The guy on the phone kept telling me I must have a puncture but the pressures are exactly what they should be and have not moved.

Not happy to put it mildly but I doubt escalating to Skoda will do anything. 

Today's experiment:

A 25 mile round trip this morning involving some sustained 70mph running.

 

Pressures at the start of the trip were checked and correct (33 front, 31 rear)

At the end of the trip, none of the wheels was especially or unusually warm.

The pressures had risen to around 36-37 on both front wheels and 32 on both of the rears. 

 

The TPMS did not go off, for a change.

 

I'll keep an eye on it.