HI, 

My XF had its battery changed a few days ago and ever since  it has developed an intermittent fault, that sometimes at start up it issues a warning beep and the parking sensor and rear Camera do not work, it is really beginning to annoy me, for god' sake how hard is it to change a battery any advice would be greatly appriciated. I have taken it back to the two garages involved and they are clueless. 

Regards

Paul

Hi Mullers,

Does it flash up park aid unavailable? I doubt it's related to the battery being changed. 

It will likely store faults for all four rear parking sensors, one sensor that intermittently goes down will stop all of them working.

It will probably show a voltage loss in the rear bumper harness, this loss will return to normal battery voltage if you unplug one at a time to find a faulty sensor.

Hope that helps you or the garage working on it!

Mine was front bumper wiring loom!

Probably unconnected with battery change but if a saloon it could be the boot wiring loom and the "battery change opening" was the last nail in its coffin. As Ernest says you need to get the codes read,

Good luck.

John

thanks