The meanings of the U1016 Code are available as general and manufacturer and the real meaning of the code is manufacturer’s information. The meaning of the code is related with network problem. So, read the manufacturer information and solve the car engine’s network problem. The meaning of the code is U for Network Code Problem is climate control system, lighting, airbags, etc. 1 for MFG – Manufacturer Specific. 0 for Fuel And Air Metering. 1 for Low Coolant Circuit and 5 for Park or Neutral Position (PNP) Switch Circuit Engine Torque Signal Circuit. The U1015 code had an intricate diagnostics process, with showing engine codes on the air training display.