I wouldn't believe that would show up on a KOEO test. Those codes are configured and stored while the motor is running. You can confirm they are fired by grounding if you unplug the round connector on the injector harness (closer to the firewall under the hood) and touching each pin to ground with the key on. There are two wires that don't go to the injectors, though so those won't work. One's orange and one is red, I think.