Not likely, it is a fault with injector number 3, if it were a fuse it would be the whole injection system. You most likely have a disconnected wire connector, a bad wire, or a bad injector.
Trouble code P1698 means: No CCD Messages Received From The TCM
Trouble code P0302 means:Cylinder 2 misfire detected
Trouble code P0174 means: System Too Lean (Bank 2)
what is this code p1491 on 2003 jeep liberty
P0203, injector number three circuit malfunction.
Trouble code P0203 means: Injector Circuit / Open - Cylinder 3
trouble code p-0837 fo jeep liberty
Trouble code P0108 means:Manifold absolute pressure/barometric pressure circuit high input
Misfire code
Scan tool, will give you a trouble code as to why the computer turned the check engine light on.
This code refers to the front oxygen sensor