This car engine P2790 Code is found after the car engine is tested. The meaning of the code is necessary to understand the problem and identify the location of the car engine problem. The best meaning of the car engine code is real meaning and you will find the general online. When the real meaning of the code is found, you may use the general meaning. Make sure that you have done all of these thing under an expert automobile engineer. If you have expertise and you know the process of solving the car engine, you may try solve the car engine.