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Bank 1 is on the side that cylinder number 1 is on, and 2 is on the other . Look up your firing order and you should find it fairly easily. And sensor 1&2 refers to before or behind catylitic converter.
P0134 O2 sensor drivers side before catalytic converters.
PO141 O2sensor drivers side after converter
P1133 insufficient switching of O2 sensors. Will probably
go away once sensors are replaced.
this is a code for a rear o2 sensor. first try to replace the fuel filter and reset code. if you have a OBD 2 code reader 30.00 wal- mart or your local parts store. if that didnt fix it replace the heated O 2 sensor it is behind the catlytic converter there is only one. its around 148.00 for it
just a word of advice there is no sensor that tells you if you need a cat ! that code comes on because of faulty o2 sensors have you changed the 02 sensors yet ? if not change them reset ( clear ) the codes that code will come on a few times just keep resetting or clearing it i have had 2 co workers not listen to me and changed the cat 400-600 dollars and the code just comes back on one guy had the cat changed two times and the code came back after i reset the codes 3 times it stayed off it seems like its preset to come on around 100,000 miles with 02 sensor codes DONT LET THE MECHANIC SELL YOU A CAT hope this helps
P0141=O2 Sensor Heater Circuit Bank 1 Sensor 2 P0161=O2 Sensor Heater Circuit Bank 2 Sensor 2, the 141 code is a problem with the heated O2 sensor on the drivers side exhaust after the converter, the 161 code is the same except it is on that passenger side exhaust after the converter.
the code you show is for the oxygen sensors post convertor. replace both the o2 sensors after the convertor and the code will go away on its own after a couple normal condition drive cycles
Under the truck, driver side exhaust pipe, there are 2, 1 is before the catalytic converter, the other is after. They screw into the side of the exhaust pipe.
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