Spn 1623 Fmi 9

J1939 Tachograph Output Shaft Speed Signal Is Erratic J1939 Tachograph Output Shaft Speed Signal Is Erratic = Undefined Value But Not Sna Spn 1623 Fmi 9 problem code is about J1939 Tachograph Output Shaft Speed Signal Is Erratic = Undefined Value But Not Sna. If you don’t take the time to look into Spn 1623 …