Material handling vehicle comprising: a load carrier, a control unit, a hydraulic system for operation of hydraulic functions of the material handling vehicle, including the lifting and lowering of the load carrier, the hydraulic system comprising at least one hydraulic lift cylinder with a passage for hydraulic fluid, a lowering valve, a lift valve and a passage valve arranged such that it is able to close the passage, wherein the load carrier is connected to the hydraulic lift cylinder such that the load carrier is lowered when hydraulic fluid flows out of the hydraulic lift cylinder through the passage when said lowering valve is opened, wherein the lowering of the load carrier requires that both lowering valve and passage valve are open, wherein control unit is connected to the passage valve, such that the control unit is able to control the hydraulic fluid flow through the passage valve by sending control commands to the passage valve, wherein the passage valve is positioned directly in the hydraulic lift cylinder and/or in the passage of the hydraulic lift cylinder wherein further comprised is a sensor device that is arranged to send sensor data to the control unit, wherein the sensor device is arranged to detect a pressure corresponding to the pressure at the outlet, or in a hydraulic line directly connected to the outlet, of the passage valve of the passage, characterized in that a further sensor device is comprised in the material handling vehicle, wherein the further sensor device is arranged to detect the pressure (P2') in the hydraulic lift cylinder, wherein the control unit is arranged to receive sensor data from the further sensor device together with the sensor data from the first sensor device, wherein the control unit is arranged to determine the pressure condition as a pressure difference (PDiff') between the first sensor device and the second sensor device, at the same moment in time, wherein if the control unit determines that there is a pressure difference (PDiff'), the pressure condition (Pcond') is fulfilled and the control unit is arranged to control the passage valve such that the fluid flow out through the passage valve correspond to a lowering speed of the load carrier that is below or equal to a predetermined emergency lowering speed, preferably the control unit is arranged to check if the passage valve is already set to correspond to, or below the predetermined emergency lowering speed at evaluation of the pressure difference (PDiff'). a load carrier, a control unit, a hydraulic system for operation of hydraulic functions of the material handling vehicle, including the lifting and lowering of the load carrier, the hydraulic system comprising at least one hydraulic lift cylinder with a passage for hydraulic fluid, a lowering valve, a lift valve and a passage valve arranged such that it is able to close the passage, wherein the load carrier is connected to the hydraulic lift cylinder such that the load carrier is lowered when hydraulic fluid flows out of the hydraulic lift cylinder through the passage when said lowering valve is opened, wherein the lowering of the load carrier requires that both lowering valve and passage valve are open, wherein control unit is connected to the passage valve, such that the control unit is able to control the hydraulic fluid flow through the passage valve by sending control commands to the passage valve, wherein the passage valve is positioned directly in the hydraulic lift cylinder and/or in the passage of the hydraulic lift cylinder wherein further comprised is a sensor device that is arranged to send sensor data to the control unit, wherein the sensor device is arranged to detect a pressure corresponding to the pressure at the outlet, or in a hydraulic line directly connected to the outlet, of the passage valve of the passage, characterized in that a further sensor device is comprised in the material handling vehicle, wherein the further sensor device is arranged to detect the pressure (P2') in the hydraulic lift cylinder, wherein the control unit is arranged to receive sensor data from the further sensor device together with the sensor data from the first sensor device, wherein the control unit is arranged to determine the pressure condition as a pressure difference (PDiff') between the first sensor device and the second sensor device, at the same moment in time, wherein if the control unit determines that there is a pressure difference (PDiff'), the pressure condition (Pcond') is fulfilled and the control unit is arranged to control the passage valve such that the fluid flow out through the passage valve correspond to a lowering speed of the load carrier that is below or equal to a predetermined emergency lowering speed, preferably the control unit is arranged to check if the passage valve is already set to correspond to, or below the predetermined emergency lowering speed at evaluation of the pressure difference (PDiff').