The engine U1090 Code comes for the car engine trouble and it is related with the car engine. When the car engine has a problem, it is necessary to fix the car engine and car engine should be fixed according to the right meaning what is provided by the car manufacturer. You can easily find the automobile dictionary meaning of the code but you should not follow any wrong meaning of the code. The automobile dictionary meaning gives wrong data. It is better if you verify the car engine symptoms to know the accurate cause of the car engine problem. Do not drive the car with any engine problem.