Ford-F150 - system too lean bank 1, system too lean bank 2
chavid (68.211.255.253) - Sun Jul 12 09:35:49 2009
I have a 2000 f-150 5.4, 2 wheel drive. I get error codes 171 and 174, system too lean bank 1, system too lean bank 2, after about 10 mins. of driving. Sometimes one, sometimes the other, sometimes both. I've checked for vacuum leaks but found none. Any suggestions would be appreciated.Charles
Reply #1 kyle (66.67.17.76) - Sun Aug 2 13:22:44 2009
i actually have the same codes poppin up, both at the same time, i have been told 2 different things, vacuum hose and fuel filter. i dont have any info, but if something comes up, maybe i can help ya, or someone can help us??
Reply #2 Mike (35.8.35.132) - Wed Oct 21 15:53:00 2009
Check out this website for a possible solution
Reply #3 Goran Borsi (99.39.203.214) - Tue Oct 27 11:13:58 2009
i had the same problem i had to replace all 4 of the oxygen sensors... if that does not do it.. then you probably have a leaking vac. hose... try that... and it doesn't hurt to put Seafoam in your tank...
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