The engine U1005 Code is U means Network Code Problem is climate control system, lighting, airbags, etc. 1 for MFG – Manufacturer Specific. 0 for Fuel And Air Metering. 0 for IC Circuit High Voltage and 5 for Park or Neutral Position (PNP) Switch Circuit Engine Torque Signal Circuit. Do not use this automobile dictionary meaning for solving the car engine. The meaning of the code is available from manufacturer meaning and without that meaning of the code, you cannot solve the problem. If you do not have experience and necessary machines, you should not try to fix the car engine problem.