C5 TPMS failure

[deaconj999]

Hi all,

MY C5 (2008) Exclusive sat on the drive for just over 7 weeks. Took it out today and FL TPMS showed up as a fault. Could it be the batteries in the TMPS on the wheel itself?

Thanks in advance

[Estately]

The batteries are supposed to last 10 years.
Could it be just low tyre pressure?

[GiveMeABreak]

Just be careful if you are going to try and increase the pressure temporarily, before reducing it back to the normal pressure, don't over inflate the tyre by more than 4-5 PSI over the recommended as the TPMS system has a range of tolerance. If you over inflate beyond a certain amount it can require resetting and the whole lot will need doing usually as part of the procedure. I've had this happen several times and Citroen couldn't just reset the one sensor back - they had to do all 4.

As has been said on a few other threads, using an accurate gauge helps to get the pressures right to start with as some of these garage gauges can be well-off.

[deaconj999]

I havent checked the pressure with a gauge yet but there is no notable odd feel as you would get with a low pressure in the tyre or a visual difference to the others. Unless a minimal loss not noticable to the visual check is the reason why the warning is shown, is this possible?
Cheers

[GiveMeABreak]

Yes it is. The TPMS systems are surprisingly accurate and have actually caught a lot of people out when the tyres 'looked' ok, but on checking the PSI was under the recommended pressures. A few PSI can do it - so do check with a gauge.

[deaconj999]

Yes it is. The TPMS systems are surprisingly accurate and have actually caught a lot of people out when the tyres 'looked' ok, but on checking the PSI was under the recommended pressures. A few PSI can do it - so do check with a gauge.

Thanks Marc