We replaced the cat converter and the code still come up. If it is the O2 sensor were is it located? Any suggestions?
O2 sensor is by the cat and sometimes there is 2 of them one before and one after the cat id look on the exhaust manifold most likely there is one there
SOURCE: Trying to replace two O2
There are three. One should be just in front of the converter and the other two are in each of the exhaust manifolds.
SOURCE: diagnsis codes
replace your bank 1 (driver's side) position 1 (pre-convertor) O2 sensor. It probably will be completely black, the p0134, 134 and 1133 are all for that O2 sensor, the P0171 is for lean fuel trim on bank 1, and the p0300 is for a misfire probably caused by the lean fuel mixture.
SOURCE: O2 sensors trouble codes come back/after being replaced
What were the codes??? You should have gotten one code if it was only one O2 sensor that went bad. If all three O 2 sensor went bad you would have gotten three different codes. P0031 (bank1 sensor1) P0051 (bank2 sensor2) P0061 to P0064 O2 sensor after the catalytic. Hops this helps.
SOURCE: 2oo0 chevy blazer cel and code p0171 and p0174
Depending on the engine it will have between 4 and 2.
If you had a straight 4 or 6 engine then there would be only 2, one on the exhaust manifold or exhaust pipe and then one just after the catalytic converter.
If you have a "V" engine (V8, V6) then you have an oxygen sensor on each exhaust manifold and will have a catalytic converter for each bank of the V. There will also be an oxygen sensor downstream of each converter as well. In this case there would be 4 oxygen sensors.
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