The engine U1238 Code is supporting content for solving the car engine problem. The engine problem is very serious problem and you should not let the car engine problem run for longer. The engine U1238 is set in many automobiles and meanings of the code are not similar. Different car manufacturers have set different meanings of the same code and your car manufacturer is also set a meaning of the code what you need to know and apply. Reading the car engine is the best way to know the meaning of the code and solve the car engine problem. Do not allow automobile dictionary meaning for fixing the car engine.