I have 2 DTC codes one is Injector 4 control circit.

Any one know how to trouble shoot this so I can get it back running.

 

Pull valve cover and check the resistance of the injector, should be all about the same for all injectors. If over 1 ohm I would suspect injector. Check the wiring in the valve cover, should be 0 ohms resistance to injectors. Wiggle the wire make sure it hasnt broken loose from spot weld connection in valve cover. You will need to disconnect the harness at the valve cover to check. Push in on the connector clip and pull up on harness connector should pull out fairly easy, use a small pocket screw driver works best. Location 3 is where you disconnect harness to check wiring to injector. Disconnect at the terminals 1 to check resistance of injector. 8mm nuts, be careful tightening do not use any air tools. Tighten connector nuts to 1.25 N·m (11 in. lbs.) torque. Be very careful not to overtighten these nuts as damage to fuel injector will occur.