The engine P1886 DTCs may also be activated by responsibilities previous down the line. Such as, a dirty MAF sensor might be another reason like the powertrain problem of the car engine problem. The car to overcorrect in its fuel trim changes. As a result, oxygen sensors are probable to report fuel combination difficulties. The real meaning of the engine code is found from the car manufacture and solve the car engine by the right meaning of the code. Do not fix the car engine by yourself if you do not know the actual meaning of the code of the car engine and all machines are not available.