Thought I'd finally post about my light. I've had it pretty much all the time since I've owned the car. When idling the injector light sometimes comes on. Giving it a bit of grunt will knock the light off.

What do you think might be causing this? blocked MAP sensor? llambda sensor?

Injectors might be dirty.. tried cleaning the injectors?

The injector hoses may need replacing.

Could be the other things you said.