emissions test failed on 1997 Nissan Pickup (D21)

I failed the emissions test...They said it was the rear o2 sensor...I just put a new one in and reset the check engine light...It came back on...Any one know what else it could be..... p0141 is the code

by in Spring Grove, IL on May 14, 2009
2 answers
ANSWER by on May 14, 2009
Can you please provide the code that is stored?
2 people like thisFlag inappropiateReply
ANSWER by on May 14, 2009
Ensure the wires/wiring harness to the oxygen sensor are not burned or melted due to contact with the exhaust manifold. The two black wires to the oxygen sensor are the ones that control the heater circuit of the O2 Sensor. Ignition key on one of those two wires should have 12 volts the other gets grounded through the fuel injection computer.
1 person likes thisFlag inappropiateReply
Related Items:
My emission test failed. 581 is my meas. what do i need to do.
Hi how do I reset the check engine light on my pickup? There is nothing wrong with the truck, it has been reset before, but I want to do it myself this time. Thanks
I went in for a smog test to register my truck in CA. The mechanic said that the catalytic converter needed to be replaced so it failed smog. Would that cause the check engine light to come on as...