PO 171 CHANGE O2 UPSTREAM AND CHANGE THE MAF SENCER CHECKED VACUUM LINES on 2002 Ford Explorer

EXPLORER RUN GOOD MAYBE GAS CAP, OR RE CHECK VACUUM LINES,SHOULD I CHANGE THE DOWN STREAM O2 SENCER, PLEASE HELP

by in Tacoma, WA on October 31, 2011
1 answer 4 comments
ANSWER by on October 31, 2011
171 is bank 1 vacuum leak. it is not the o2, that is the last thing. it could be and most likely is a vacuum leak on that bank at the upper intake. other possibilities is the pcv, low fuel pressure or a mass air flow sensor. Roy
COMMENT by on October 31, 2011
Thank you Roy.
COMMENT by on October 31, 2011
good luck
COMMENT by on November 01, 2011
Roy,you are good. fund a damage hose elbow type under my throttle body....thanks again for your help. Nathan6969 from Seattle wa. I wish you a good life.......
COMMENT by on November 01, 2011
thanks, glad to help Roy