Question about 2003 Nissan Frontier Crew Cab
Specifically, I need to know which is the signal wire for the pre and post o2 sensors. Thanks!
Posted by Anonymous on
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Posted on Jan 02, 2017
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 .
Posted on Jan 04, 2009
It is located on the engine block itself in the valley between the cylinder heads. The entire intake manifold has to come off to access it:
Posted on Oct 30, 2009
Testimonial: "I am well satisfied with the quick response and information. Chuck"
In here can find the procedure about O2 sensor replacement: Bosch Universal O2 Sensor Installation Instructions
And here someone images about one typical change O2
Posted on Dec 28, 2009
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)
Posted on Feb 12, 2010
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