Originally Posted by prism

Thank you all for your very helpful comments! The part about calling it a spark plug is my bad.
I don't actually have the error code but on the receipt it is marked that injector #4 is not working within specs. It also mentions that the glow plugs need to be replaced. He service guy told me that changing 1 injector would set me back $600 and he recommended that I change all 6 because the problem would spread to the remaining 5??? Is this like a contagious disease?
Anyways I appreciate all the help on this.