Get real meaning of the U1013 Code and if you do not use the real meaning of the code, you cannot work well. The general meaning of the code is automobile meaning what is useless. Get the real meaning from manufacturer and you must not use any false data for solving the car engine. 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 3 for Transmission Control Module Reprogrammable Memory. The U1013 engine code looks a kind of network problem.