The engine U1145 Code has several meanings and all meanings are not useful for solving the car engine. Do not allow any meaning of the code or use automobile meaning. The automobile dictionary meaning is found online for free and easily. That meaning is U for Network Code Problem is climate control system, lighting, airbags, etc. 1 for MFG – Manufacturer Specific. 1 for Transmission. 4 for BBV Sensor Circuit Low Voltage. 5 for Park or Neutral Position (PNP) Switch Circuit Engine Torque Signal Circuit. The U1145 engine code seems a kind of network problem what can be solved easily.