Hi folks, I have a TPMS light that will not reset. 

 

I've run a VCDS scan and it simply tells me that the tyre pressure is low. No other ABS fault codes. 

 

If anyone knows why it might be doing this and how to fix it, it would be much appreciated.

 

Alternatively, if anyone knows how to disable the TPMS altogether that would also be appreciated, as I would like it to pass an MOT. 

 

Thanks,

Allan.

Welcome.

 

Are you pressing the TPMS button while stationary and it makes a noise to let you know set, then driving off and yet it is not extinguishing the light? 

Yes, however there is no chime, and light comes back on almost immediately. Driving it any distance does not seem to make any difference.

15 hours ago, sprocketpower said:

Hi folks, I have a TPMS light that will not reset. 

 

I've run a VCDS scan and it simply tells me that the tyre pressure is low. No other ABS fault codes.

How about traction control faults?

No other faults unfortunately. It's a bit of a head scratcher.

Faulty ABS sensor causes exactly what you describe.

 

You say there are no other faults, on what basis? Maxidot display? OBDII reader? VCDS or equivalent scan?

 

You should be more concerned with fixing a fault rendering several safety critical systems disabled (ABS, ESP, ASC etc) than disabling a warning light to get a bent MOT.

 

If you were able to disable the light it should still fail the MOT because they look for the absence of safety critical warning lights during the self test when ignition turned on.

Apologies, I see now that you have run a VCDS scan, I would go into output tests and check that the reset switch output is being seen.

When my wheel speed sensor was intermittent it would reset after driving away, when it had failed completely it did as your vehicle is doing.

36 minutes ago, J.R. said:

 

 

You should be more concerned with fixing a fault rendering several safety critical systems disabled (ABS, ESP, ASC etc) than disabling a warning light to get a bent MOT.

 

Hi J.R,

 

I am not trying to disable any safety critical features. Considering this is an 08 Vehicle, TPMS is an optional extra, I am simply asking if I can "uninstall" this feature, as currently it is more grief than it is worth. ABS and ESP all seem to be working fine and have given no indication otherwise. I am getting no fault code referencing a wheel speed sensor, how do I go about diagnosing which one has failed?

 

Thanks.

44 minutes ago, sprocketpower said:

I am getting no fault code referencing a wheel speed sensor, how do I go about diagnosing which one has failed?

 

1 hour ago, J.R. said:

I would go into output tests and check that the reset switch output is being seen.

 

You can also view the wheel speeds (read from the ABS sensor in real time, I take the computer to the wheel and spin it, the wheel that is!!!

Edited 26 November, 20241 yr by J.R.

I see that TPMS was not mandatory until 2012 but I suspect that if it was factory fitted and I very much doubt yours was an option then it has to be working for an MOT, whilst I may at times find it a PITA its because I have a slow puncture so it's timely reminders keep me and others safe.

 

How can you disable it? Well if it had a seperate control module then you could unplug it and delete it from the installation list, I have done this with my Bluetooth module but strongly advise against doing it for TPMS, if you are determined then you have to find the module which controls the function, probably ABS or instrument cluster then change the long coding to remove that option, again I do not advise anybody to do this.

 

36 minutes ago, sprocketpower said:

ABS and ESP all seem to be working fine and have given no indication otherwise

 

Have you put them to the test or are you relying on no warning lights? Have you driven beyond the cars limits and skidded (not advised) have you done a full on ABS stop?

 

I had a problem with low battery voltage causing communication errors with the ABS module on my Octavia2, no ABS warning came up but I did a test in a safe area, all 4 wheels locked very early on and there was so much over servo assistance that it was difficult to modulate the pedal properly.

 

Years ago when the road was (to me) my personal racetrack the ABS on my XR4x4 Sierras would cut in several times a day, I have matured and could not tell you the last time the ABS cut in, probably over a year ago hence why I test it, as for the ASR etc when it cuts in my eyes are on the road not the dashboard, unless I have made a severe misjudgement you cannot even feel it cut in, you have to look at the dash, I oly have vision in one eye and hence a narrower field of vision, others may be aware of  their ASR light winking while watching the road ahead.

The VCDS scan, is what makes me believe there is no issue with the ABS. The only code I get is specifically TPMS and it will not reset. The ESP I have definitely put to the test and is functioning absolutely fine. I've checked the functionality of the set button and it is working.

 

I don't seem to be able to access the long coding for the ABS module. Only soft coding.

 

Thanks,

Allan.

I've just checked all the wheels wheelspeed sensors, with vcds mesure blocks, and they are all happy. So still not sure what is causing the TPMS light

Try Output Tests on the reset switch, its probably something very simple like not making contact properly.