The C1142 Code is found in the car engine and it is necessary to get the real meaning for solving the car engine. You should not use the general meaning for solving the car engine but you can read the general meaning of the code for solving the car engine problem. The general meaning of the code is C for Chassis Code Problem is controller area network wiring bus and modules. 1 for MFG – Manufacturer Specific. 1 for Transmission. 4 for BBV Sensor Circuit Low Voltage and 2 for A/C System High Pressure High Temperature. The engine code C1142 is a kind of chassis problem.