The general meaning of the C1103 Code is available online and it is not very important thing. 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. 0 for IC Circuit High Voltage and 3 for Transmission Control Module Reprogrammable Memory. The code is meaningful and the manufacturer meaning of the code is very important for solving the car engine. Read the manual of the car engine and it helps you to solve the car engine problem with the least price.