The engine would run very rough - it wasn't drivable!
Oddly, the CEL occurred when putting the Jeep in reverse.
I tracked it down to be an injector wire grounding out on the fuel rail.
The contact created an open circuit, causing a misfire in cylinder 3.
I assume that the transmission/engine torquing differently in reverse was the cause.
I repaired the wiring loom and secured it away from the fuel rail to prevent this in the future.
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