Vauxhall Insignia p0268 injector 3 circuit high

Check the wiring at injector . Generic check ,
Inspect the electrical connector on the fuel injector. Look for bent or pushed out pins. Install some dielectric grease and push the electrical connector on the fuel injector. Make sure it is a tight fit and the metal spring retaining clip is in place Start the engine. Place a long screwdriver handle to your ear and the tip on the fuel injector. A clicking sound indicates a working injector. No sound is the opposite Disconnect the fuel injector. With an ohmmeter, check the resistance between the two male terminal blades. A good injector will have 0.5 to 2.0 ohms. More or less ohms indicates an injector with an internal short.If not that , probably injector knacked / needing cleaned . Could try injector cleaner additive .

I will try that today ive had it carbon cleaned and only use shell or bp diesel since ive owned the car and service it twice a year inc all filters and oil change i have also used various additives like millers and redex wynns injector cleaner im hoping for a silly wee wiring fault rather than the ecu but its booked in for Monday with argyle diesel and electric here in lanarkshire so heres hoping and thanks for the reply its much appreciated

Hope it's something simple , lets know how you get on .

I will do m8 and thanks for the info

Glad to help in any way I can .