The engine P0973 Code is important thing and you need to fix the car engine. The engine should be fixed before driving the car engine. The engine code lets you know for solving the car engine. The powertrain of the car engine is easy to solve and it may be fixed at the least cost. The valves of individual cylinder are kept locked using a pair of arms that substitute the conservative engine’s roller-type rocker arm. The engine P0973 code is one of these arms what follows the cam profile while the 2nd arm joins to the valves. During normal engine process the 2 arms are combined by a fastening pin.