The P0205 code is a common issue in vehicles with fuel injection systems. It indicates a malfunction in the injector circuit of cylinder 4. There are several potential causes for this problem, including a faulty injector, wiring issues, or a problem with the engine control module. To solve the issue, it is important to carefully diagnose the underlying cause and address it accordingly. This may involve replacing the faulty component or repairing damaged wiring. Working with a qualified mechanic can help ensure a proper diagnosis and effective resolution.