The automobile meaning of the C1402 Code is necessary thing and you can get the meaning from online. The automobile meaning of the code is C for Chassis Code Problem is controller area network wiring bus and modules. 1 for MFG – Manufacturer Specific. 4 for Transmission. 0 for IC Circuit High Voltage and 2 for A/C System High Pressure High Temperature. The code has started with the C letter and it means that chassis of the engine has the problem. The engine C1402 code had an extravagant diagnostics procedure, with showing the engine trouble codes on the air acclimatizing display.