Got a problem with the 'burban. Code reader comes up with B0305....internet search comes up with, "Control head #3 (rear) feedback circuit low" What does this mean???

 

You sure you're not seeing PO305? The "PO" is a POwertrain code, 305 means cylinder #5 misfire.

 

body code hence B....probably refers to the hvac controller head...all the buttons or dials that control the heater/ac functions. Since your internet search defintion says rear; the vehcile probably has rear hvac controls. Does your scan tool name the module the code set in? Hvac control module??

What is the actual problem that your trying to fix?

 

looked up that code for a 03 suburban 4wd; its not a valid code.

Are you using an outdated scan tool or entering an older model year with your code reader in order to read the code?