Question about 2001 Ford Explorer Sport Trac
Ford explorer ,4 litre. have code of P0171 system too lean bank 1. i am thinking that it may be the intake gasket.i have to put the throttle down to start when its cold
You could be right but before going to all that trouble of replacing the intake gasket take a close look at the MAF (Mass Air Flow) sensor. Also look for a vacuum leak downstream of the MAF sensor. The MAF sensor may be dirty especially if you are using an "oiled" air filter and it was over oiled. Remove the MAF sensor and clean it with electronic cleaner. Make sure it is dry before reinstalling. If it is damaged, replace it. Also replace the fuel filter as a partially clogged filter has been know to set this code on some vehicles. Check all vacuum hoses and replace as necessary.
Posted on Nov 14, 2009
Check the elbow going to the PVC chances are it is cracked. Cheap and easy to replace. After that check the fuel filter and pump. 99% of these error codes are attributed to those items.
Posted on Sep 11, 2012
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Posted on Jan 02, 2017
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