The general or automobile meaning of the engine U1187 Code is U for Network Code Problem is climate control system, lighting, airbags, etc. 1 for MFG – Manufacturer Specific. 1 for Transmission. 8 for Exhaust Gas Recirculation System Valve 1 and 7 for Cruise Inhibit Control Circuit. You can apply this general meaning of the code when the car engine’s real meaning of the code is not found. If you are not an automobile engineer and you do not know how to fix the car engine, you should not try to solve the car engine problem. You must hand over the car to automobile engineer.