Chirping sound coming from engine bay.

Has anyone else experienced a chirping sound coming from the engine? For me it doesn't make the sound when I start it cold, but it starts showing up after I've driven it around a bit. The sound is most noticeable at idle. I've gotten out and popped the hoood and it sounds like it is coming from the same area as the injector tick. Just wanting to get some feedback to see if i should be worried or not.

 

SEARCH. So many threads about this.

 

High Pressure Fuel Pump

 

yep....HPFP.......had mine replaced but they said it would return.....it did

 

Woops, just did. Don't mind me and my inability to search

 

Only said something because I literally read another thread about this like 6 hours ago with a near identical title...haha

 

I offer another possibility for chirping sounds coming from the engine bay... this guy probably missed a few maintenance cycles too. I've had rabbits chew wires under mine, so this is a real risk if you park in open spaces for too long.

 

They would be like truck mascots at that point