P1171 Fuel Air Metering / Fuel System Lean During Acceleration
- could be dirty maf, dirty intake air temp sensor, clogged fuel filter and/or clogged EGR. Any symptoms? Search .info for where these are and how to address the issues. And actually a search for P1171 brought up info on this very board from 2004...

BTW, Anything above P1000 will be Manufacturer specific and NOT in a general list of codes. See attached PDF