Chrysler Repair: 2007 caliber P0004 code, dodge caliber, regulator circuit

Question
I have a 2007 dodge caliber that has the check engine light come on, when I run a diagnostic on it, it comes up with P0004 fuel volume regulator circuit high. What causes this, and how can I repair it? Is this something I can do myself or do I require a mechanic? Thanks so much for your response.

Answer
Hi Cameron,
I have manuals through '06 but please tell me which engine is in your caliber so I can see if I can find the code. Are you sure it is # P0004 as I haven't noticed one that low in anything I looked at so far.
Roland
PS Sorry for the delay but I just found your question in the pool where it had been referred by Kevin