Question about Lincoln Navigator
Where are the 2 upstream O2 sensors located and are they hard to get to when being replaced ?
An upstream O2 sensor is located before the catalytic (CAT) converter; check follow diagram location...
Fig.: O2 sensor location (zooming link HERE)
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Posted on Feb 10, 2012
They are in the exhaust manifolds. If you look from under the vehicle you will see them. They will be before the catalytic converter.
It is unusual for both of them to be bad. Is there a problem or symptom that leads you to believe they are bad?
Posted on Feb 10, 2012
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Posted on Jan 02, 2017
SOURCE: Upstream O2 sensor location?
That is the first sensor closest to the engine. The downstream sensor is the one behind the converter.
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Posted on Aug 31, 2008
SOURCE: o2 sensor location
DTC P0156 indicates the output voltage of the downstream Heated Oxygen Sensor (HO2S) is less than some calibratable functional window.
The possible causes are:
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Posted on Apr 16, 2009
Upstream, as in ahead of the converter, back toward engine. Start at converter and work your way back, should be on exhaust pipe or even on manifold.
Posted on Jan 11, 2009
SOURCE: location of oxygen sensor
There is only 4 sensors on a 2000 dodge intrepid and the bank 2 sensor 2 is the sensor located on the right (passenger) side and the one located after the catalytic converter (the one close to the firewall).
Posted on Apr 22, 2009
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
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