Question about 1996 Ford Windstar
My 1996 Ford Windstar V6 3.8L was having several problems this winter. Antifreeze leak, Heaters don't work. Replaced Water pump and flushed Heater core. Later on Transmission slipping. Replaced 2 sensors. The mechanic checked the codes and they are P0171, P0420, P1537 and P1538.
If possible how can I fix these problems myself?
Where are these components/parts located?
It could all be related.P1537/38 are the intake manifold runner controls are stuck open.They are controlled by vacuum solenoids.The P0171 is bank one of the engine is running lean,usually caused by a vacuum leak, P0420 is catalytic converter efficiency code. The computer monitors the switch rate of the front 02 sensors and compares it to the switch rate of the rear 02 sensors to tell if catalytic converter is doing its job. Now if the front 02 is not switching properly then this will cause this test to fail and set this code.
Look on bottom section of the intake manifold at the back of engine(where tranny bolts up) you should see the vacuum motors there on the intake,these are the control motors for the intake manifold runners.Make sure the vacuum lines are hooked up and lines are not leaking. Also you will see a lever from it to intake make sure they move and are not binding.
Posted on Mar 11, 2009
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Posted on Jan 02, 2017
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System Too Lean (Bank 2)
Basically this means that an oxygen sensor in bank 2 detected a lean condition (too much oxygen in the exhaust.
Note: This DTC is very similar to P0171, and in fact your vehicle may show both codes at the same time.
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