An automatic transmission control solenoid valve is a valve that controls the flow of oil in an automatic transmission. It is generally located in the valve block of the automatic transmission and is controlled by the automatic transmission computer. The solenoid valve is responsible for opening and closing the oil circuits that allow gear ratios to be changed. CITROËN: 16 079 912 80, 1607991280, 2574.10, 2574.16, 257410, 257416, 96 537 604 80, 9653760480 DS: 16 079 912 80, 1607991280, 2574.10, 2574.16, 257410, 257416, 96 537 604 80, 9653760480 Automatic transmission for OPR number (vehicle manufacturing date) from: up to 08219 Transm. ID: AL4 Automatic transmission for OPR number (vehicle manufacturing date) from: up to 08219 Transm. ID: AL4 Automatic transmission for OPR number (vehicle.