Help with cel please!
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Junior Member
Joined: Jul 2009
Posts: 2
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From: nj
Help with cel please!
I just got a 2003 f150 with a 5.4 a few weeks ago. After reading alot of helpful posts on this forum I have fixed codes P0171 and P0174 that were causing the cel, problem was the pcv tube was cracked causing a vacuum leak. Now a week later cel comes back on, I pull codes and they are P0172 and P0175 now. So i cleaned the maf again, tested fuel pressure, changed fuel filter and checked for vacuum leaks again, nothing worked. The truck does not have any drivability issues, but i am due for inspection in oct and need this light off. If anyone could give me causes of this codes it would be helpful. I tried searching and I adressed the answers i got through that, but cel stays on. any tips? thanks
Member
Joined: Jul 2003
Posts: 27
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From: Vassalboro, ME
based on
http://autorepair.about.com/library/...bl406a-lib.htm
171 and 174 together indicate together indicate a lean condition
172 and 175 together indicate a rich condition
did you reset your computer after fixing the vaccuum leak - or just clear the codes? now that the vaccuum leak is fixed, is it still trying to overcome the lean condition that is no longer there?
http://autorepair.about.com/library/...bl406a-lib.htm
171 and 174 together indicate together indicate a lean condition
172 and 175 together indicate a rich condition
did you reset your computer after fixing the vaccuum leak - or just clear the codes? now that the vaccuum leak is fixed, is it still trying to overcome the lean condition that is no longer there?