P0171 code

workhorse1

I have a 2007 Audi A-4 Quattro Cabriolet. It has new coil packs, new fuel filter, new Air mass flo sensor, throttle position sensor, but still throwing a P0171 code. Any suggestions , thanks John

Mr_Shiftright

Here's a GOOD TUTORIAL on the P0171 code. Seems like there's been too much guessing going on and a more careful diagnosis with a professional scan tool might be needed. Also, as the article states, vacuum leaks are a common culprit.