Question about 2004 Ford Taurus
There are a number of things that can cause these codes to come up (they mean bank 1 and bank 2 lean fuel mix, which is too much air, or not enough gas ), Here are some possibilities:
common on fords--bad differential pressure sensor (DPFE), this sensor is located on the engine near the EGR valve, it monitors EGR flow, it may be misreading the flow, which increases EGR resulting in a too lean fuel mix. To fix, replace DPFE.
Leak @ PCV valve
Leak @ EGR valve
Dirty Mass Air Flow Sensor
Dirty fuel injectors
Low fuel pressure
Vac leak @ intake manifold.
So, sorry there are so many possibilities, but now u have a list. Let me know what u find.
Posted on Nov 20, 2008
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Posted on Jan 02, 2017
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