The plot thickens.
So they've slotted a new set of injectors in and not coded them.
As Karl mentions this is easily checked by techstream, other diagnostics are available, a chap i know has a Snap On diagnostics tool, he used this to code in new injectors he fitted to an Avensis, so it doesn't have to be Techstream to check this out.
However, pardon me for being a bit thick here, but if the injectors were not coded how is the engine running at all, how can the new injectors open and respond if the ecu isn't aware of them, its not a mechanical injection system firing fuel down an injector pipe for a given pressure and timing, don't electronic injectors simply take what they need whe ninstructed by the ecu from a constantly pressurised common feed rail?...please try and make any answers suitable for the idiot at the back...me.
Did they replace the injectors or did they get the present set reconditioned and refitted in the same cylinders.