The general meaning of the C1168 Code is not going to help you for solving the car engine. The automobile or the general meaning of the car engine is C for Chassis Code Problem is controller area network wiring bus and modules. 1 for MFG – Manufacturer Specific. 1 for Transmission. 6 for Control Module Throttle Actuator Position Performance and 8 for PCM Stack Overrun. The car C1168 engine code is a kind of chassis problem and it is easy to fix and cheap. After solving the car engine problem, take the car for a test drive and detect the car engine problem.