Need help with a code

[gregor]

I just pulled a code, it was P0470, it is and Exhaust Back Pressure Sensor Circuit Error. The check engine light never came on I got this using my Superchips programmer. I was wondering if this is something that I should be worried about fixing right away or can it wait? I plan on upgrading the exhaust to 2 five inch stacks in the next couple of months so can this wait till then?