I have a 2013 Ford Focus SE and I received a P0202 code. I changed out the fuel injectors and it still didn't fix the shuttering/rough idle problem. Are there any other possible problems that could be the cause of this? I tested the connection of the main wire harness that connects to the injectors and the voltage range was between 9.8v-10.3v, voltage for cylinder two started at 8.4v and ended up at 9.8v. All of the connections started low and went up as I held the multi-meter against them. I read online that the connections should be 10v-12v for each injector. Does anyone have an idea of what the problem could be and how it could be fixed? BTW when driving with the reader connected to the vehicle, I see on the diagnostics that I have an OL-Fault for fuel system 1. Spark plugs checked out okay. Anyones help would be much appreciated.