Xsara Tire Pressure Sensor Fault

I had a similar issue on my Xsara. Those sensors can be a pain. Double-check the actual tire pressure with a manual gauge first, to rule out leaks or inflation issues. Is it only one tire, or are you getting multiple warnings?

Good shout on the manual gauge, I'll give that a go. It seems to be only one wheel that's giving me grief, but could one faulty sensor cause the system to throw a general error?

Yes, a single faulty sensor can definitely cause the whole system to wig out and throw a general error. More likely it's just a sensor failure. Unfortunately, you'll probably need to visit a workshop to get it properly diagnosed and replaced.

Cheers for the advice! Turns out it was exactly as you suspected - dud sensor. Bit of a sting at 280€ for the replacement and labor, but at least the annoying warning light is gone!