What is the orange-with-black-stripe and single grey dots does?

[yh61r]

I'm wondering because there are two of them in the harness from the ECU to the engine.

Also wondering about the yellow with single dots wire. There are also two of these.

[Raf99]

I'm wondering because there are two of them in the harness from the ECU to the engine.

Also wondering about the yellow with single dots wire. There are also two of these.

These are wiring color codes. Check your manual for which wire are those colors.