The engine U1102 Code is very supporting thing and it becomes helpful when the car engine code has a meaning. The engine code U1102 is found online and that is called automobile dictionary meaning. The automobile dictionary meaning is not very useful. The U1102 code is u for Network Code Problem is climate control system, lighting, airbags, etc. 1 for MFG – Manufacturer Specific. 1 for Transmission. 0 for IC Circuit High Voltage and 2 for A/C System High Pressure High Temperature. You have to find the real meaning and the real meaning of the code is related with the car brand and car manufacturer.