As the technical liaison for various models in our club, I have for the first time had a case from an XF owner;
Out of the blue last weekend, cruising in 50km/h, the engine started misfiring and died within seconds. Message on the screen was «Gearbox failure», «DSC not available» and «Battery fault» (the latter only flashed up on the screen for and disappeared).
After this, the car wouldn’t fire up, but after being left alone for 5 minutes, it fired up as normal. Went through the gears with nothing untoward to be heard, but after a few minutes idling, the same happens again. Engine warning light is lit plus the same messages as above constantly displayed.
He’s looked into the battery and made sure that is good and fully charged. BTW; does this car have an extra auxiliary battery, like some Mercedes of the same vintage have?
Also checked all the relevant fuses which were cleaned to the metal. Started up again and the car ran for about 15 minutes, then died.
Did a diagnostic test at a workshop, resulting in messages relating to the fuel pump and CPS (Cam position sensor), which I myself lean towards as a plausible explanation.
Any wisdom on this on the forum?