Help Tt600

Hey everyone hope your all doing well.
Me, I have a headache trying to catch the gremlin causing a p0201/p1201 short/open circuit injector 1.
Ok things I have done.
1. test ohms at ECU plug and the injectors themselves.
Injector 1 12.8
Injector 2 12.7
Injector 3 12.8
Injector 4 12.7
Tested for shorts. Came back normal
Tested continuity. Came back normal
Tested injectors with test light power is good
Tested injectors signal with test light. looks good
Took loom apart to see if there was anything that might be the cause. Nothing
I have swapped injectors round and still get the same code.
I am at a loss to what it could be. I know the injector ohms is on the very low side. Could this be the ECM playing up as the injector seems to be firing or is the very low ohms resistance causing this. Your input is greatly appreciated.

 

Has anyone got any ideas.

 

Updated original post with figures.