The general meaning of the C1216 Code is found online that is c Chassis Code Problem is controller area network wiring bus and modules. 1 is MFG – Manufacturer Specific. 2 is Accelerator Pedal Position (APP) Sensor 1 Performance. 1 is Low Coolant Circuit and 6 is Cruise Control System – Vehicle Accel Too High. The general meaning of the code is not necessary to use for solving. Deactivation of cylinders is realized by releasing a synchronizer pin that usually interlocks the cam follower and rocker arms. C1216 code resolves the synchronizer pin is unconfined using hydraulic compression which is maintained by a dedicated solenoid.