The meaning of the C1224 Code is related with the manufacture and model number of the car and it is related with the car engine. Do not use the false/automobile dictionary meaning for solving the car engine. The automobile dictionary meaning of the code is found online and that is C for Chassis Code Problem is controller area network wiring bus and modules. 1 for MFG – Manufacturer Specific. 2 for Accelerator Pedal Position (APP) Sensor 1 Performance. 2 for Air Conditioning (A/C) Clutch Feedback Circuit High Voltage and 4 for Cruise Vehicle Speed/Set Speed Difference Too High. It is easy to fix.