C1220 Code is related with the car engine problem and for solving the car engine problem, parts or components should not be traded with reference to only a C1220 DTC. The car service physical should be referred for more information on likely causes of the fault, along with mandatory testing. The valves of each cylinder are remained closed by a pair of arms that substitute the conventional engine’s roller-type rocker arm. The C1220 code is one of these arms what follows the cam profile while the 2nd arm joins to the valves. During normal engine operation the 2 arms are combined by a locking pin.