My check engine light keeps coming on. I have had it to the dealer 5 times. Each code is PO305, injector #5. They have Switched coil wires around, changed plugs, changed fuel injector and most recently used a engine cleaner, thinking carbon has built up on the valves and the light still came on. After the engine cleaning on March 23rd, I came home and while talking to my neighbor with the truck in park & the engine running at idle the light came on after 2 minutes. Most times though it came on after I drive somewhere, park for a while and then after starting it up the light comes on. I'm not sure if this has anything to do with it but I just noticed that when the check engine light is on, my passenger door window doesn't work.