The C1157 Code is an important issues and without getting the real meaning of the code, it is not possible to solve the car engine. The general meaning of the code is related with the general meaning and the 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. 5 for TP Sensor Learn Not Complete and 7 for Cruise Inhibit Control Circuit. The engine C1157 code had an sumptuous diagnostics process, with showing engine trouble codes on the air conditioning display. However, the system was troublesome and a rash of changeable failures led to the technology being rapidly discharged.