4 o2 sensors 2 manifold 2 under the cat converters
SOURCE: location of a o2 sensor 2001 nissan maxima
bank 1 refers to the side of the engine that #1 cylinder is on , and sensor 2 refers to downstream , after the catalytic converter. , this link shows bank 1 on a 2001 nissan maxima V6 being on the firewall side . if you had a 4 cylinder it would be downstream after the catalytic converter .
http://www.autozone.com/N,26200242/shopping/specsSelect.htm
SOURCE: o2 sensor location 1997 pontiac grand am 2.4 4 cyl auto trans
BANK 1 SENSOR 1 IS THE ONE IN THE EXHAUST MANIFOLD. BANK 2 SENSOR 2 IS BELOW THE CATALYTIC CONVERTER.
P0171 SHOULD GO AWAY WITH A GOOD O2 SENSOR BUT DO CHECK FOR VACUUM LEAKS TO BE SURE. 3.1/3.4L ENGINES HAVE A BAD DESIGN INTAKE MANIFOLD GASKET, THE LEAK OIL, COOLANT, AND AIR.
SOURCE: location of the bank 1 sensor 2 O2 sensor on a 2001 ford escape
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
SOURCE: I have a 2003 Nissan Sentra SE-R Spec V. o2 sensor location?!?1
theres always one on the intake manifold working its way down to catalytic convertor is the oxygen sensor 1 heater circuit(pre cat conv) signal while terminal #25 is oxygen sensor 2 heater circuit (post cat conv)
SOURCE: On a 2001 chrysler sebring coupe lxi 3.0 where is
my 2001 chysler sebring lxi 3.0 liter will not start and the starter is brand new
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