The computer can see an injector problem due to an open circuit, out of range, or shorted circuit. An injector could be mechanically stuck open or closed and as long as the circuit is within specs.....no code related to an injector, just the misfire.

The computer can also see a misfire. Two separate things. Yes they can be related, but the computer has no idea of what caused the misfire. It measure time between pulses on the crank sensor and compares all 6 of them against a predetermined value. It uses that information along with the cam sensor to determine which cylinder is misfiring.

 

Your right VZ guess I was not specific enough...a guy could easily have a stuck injector and the ECM would never know it..happens all the time probably more then the cylinder/injector misfire code.

usually when they stick open it takes the low oil pressure light to find out...or the oil/diesel mix pouring out of the breather tube

 

Yea! That whole oil light thing is a bad indicator! Many times I wish that cars/trucks had more info available, and other times wish they didn't have near as much!

 

lol true, true