Hey guys I just bought my first CTD abot 2 weeks ago. I have a couple of questions for you. It has 2 codes in it 0500 and a 1693 shoyuld I be worried about these? the first thing I did when I got this truck was to have a FASS system installed after reading up on all the lift pump failures. My other question is will a aftermarket exhaust void my warrenty if so I better take the stock system out carefully. My truck is a 2001 3500 quad cab 2 wheel drive 5 spd 54,000 miles.