Question about 1988 Ford Ranger
It has 1 o2 sensor. located just before 1st cat converter.
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Posted on Jan 02, 2017
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
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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There are 4 oxygen sensors (o2 sensors)and they are all located on the exhaust coming from the motor under the vehicl by the catylac converters.
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