The automobile meaning of the engine code is not very helpful for solving the car engine problem,. The automobile meaning of the engine U1191 Code is found online and it is free. The automobile meaning of the code gives only general information for solving the car engine. If you have real meaning of the code, then you must not accept the automobile dictionary meaning of the code and it is U for Network Code Problem is climate control system, lighting, airbags, etc. 1 for MFG – Manufacturer Specific. 1 for Transmission. 9 for Crankshaft Position Sensor Circuit Performance and 1 for TFP Valve Position Switch-Drive Without Drive Ratio.