JimWest

Just so this does not become an "empty" destination, as who is not going to come here when google throws up this page for XF OBD location, the OBD port on a 260 model XF (2015 onwards), and I believe it is the same for model 250 XF (cars built before the changeover in 2015) although I can’t confirm, is in a RHD car just passed the trim cover under the steering wheel into the grey sound deadening material. Difficult to locate if sat in the driver’s seat so I have found it best to kneel outside with the door open and look up passed the trim into the sound deadening material and there you will find your prize, sort of centre. Watch out too, the port will rock about a bit too (about a cm) which is a little disconcerting at first when you try and connect your scanner. Can be done from the driver’s seat “blind” once you have a had a little practice! You can try cheap OBD port connectors (say £5.00 on aliexpress/ebay/amazon) with free downloadable OBD software (do a google store search!) that works on a smartphone via bluetooth connection to get a feel for it, before you decide to invest £££ in the latest and greatest!

The stop start "not working" problem 9 times out of 10 is simply that the battery is considered by the battery management system (BMS) to be too discharged to continue to risk stop start gobbling up more amps on an already depleted battery. It is a "safety" feature of the BMS to prevent the stop start technology leaving you unable to start the vehicle when the battery is too depleted. All that is needed is to let the car do its thing and charge up again on a longer journey, the car will temporarily disable stop start until it deems the battery sufficiently charged. Short journeys to Tesco will not do and are probably the problem for a depleted battery! Or you can try charging the battery with a AGM type trickle charger at no more than 4 amps, high amps can kill an AGM battery by overheating and blowing the battery valve to vent internal pressure. "Full charge" for an AGM battery for those with a volt/multi meter is considered greater or equal to 12.6 Volts but less than or equal to 13.0 Volts.