You need to get the meaning of the faulty B1669 Code and it is important to solve the problem if you want to drive the car. For the engine problem, the code appears and this code comes when the engine is diagnosed. The B1669 code is related with the faulty engine and for the body of the engine, the problem is occurring. You should not try to solve the problem by yourself. If you have all necessary machineries and components, you can solve the problem but if you do not have all necessary things, you should not try to solve the problem.