P0201 - Injector Circuit Malfunction - Cylinder 1
You don't "change" anything until testing proves it to be necessary. First of all, you didn't list any symptoms, observations, or clues, so I have no idea what kind of problem you're trying to repair. More importantly, diagnostic fault codes never say to replace parts or that they're bad. They only indicate the circuit or system that needs further diagnosis, or the unacceptable operating condition. When a part is referenced in a fault code, it is actually the cause of that code only about half of the time. First you have to rule out wiring and connector terminal problems.
If you can't find anything wrong with the wiring, swap the injectors between two cylinders, erase the fault code, then see if a new code sets for the cylinder you moved the suspect injector to. If it does, the injector is a good suspect.
Friday, August 14th, 2015 AT 1:45 PM