Question about 2001 Ford Taurus
Bank one is the engine cylinder bank near the engine firewall (see diagram). The bank one sensor one is the Oxygen sensor (O2) located in the exhaust pipe just of the engine cylinder bank at rear and before the Catalytic Converters.
Posted on Dec 28, 2010
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Posted on Jan 02, 2017
B1 means the sensor is located on the same bank of the engine that has the #1 cylinder. B2 is located on the opposite bank.
S1 means the sensor is located BEFORE the catalytic converter
S2 means the sensor is located AFTER the catalytic converter
You didn't say which engine you have, so I've included the diagrams of both 4 cyl and 6 cyl so you can see the banks
Posted on Oct 20, 2009
#1 is the egr position sensor #4 Is for single cylinder misfire so this could be the coil or a bad plug or wire ..but with fords should check for a vacume leak that can cause a misfire to .....#2#3 are 02 sensors before i would change them i would check the mass air flow sensor ..Hope this helps
Posted on Nov 10, 2009
If it was the upper o2 this is the one.This does not mean the o2 is bad,check the spark plugs and boots,and fuel pressure.The fuel ratio is not correct on that bank.
Posted on Apr 13, 2010
You will be told that it is passenger side 02 sensor before the cat,, but it is not .. Drivers side right after the manifold is the one you are after.
Posted on Jul 31, 2010
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