Hello together, on an XC70 from 2007 with approx. 160,000km the error message “Four-C maintenance required” is present. I started from a suspension problem of the Four-C system. However, when reading the error memory of the DEM module I received the error message: “DEM0006 – conveying pump false signal” A check of the live data showed that the DEM can be easily controlled, but the pump pressure in the Haldex coupling remains at 0 bar. I therefore assume from a problem of the Haldex pump. Does anyone have relevant information about this error message? Greetings!