dave moore
Member
my service light came on at 75,000 mi on my '01. i had the code read: P0171 system too lean (bank 1) and P0174 system too lean (bank 2). I have already replaced the DPFE sensor last october. I changed the fuel filter again and the codes still remain. Should i have the injectors cleaned? Clean the O2 sensors? Clean the MAP sensor- I do have a K&N. Any suggestions?