sr20jet said:Don't you mean GA16DE? You really don't need to replace your O2 sensor unless you get a check engine light. .
Replacing the O2 sensor is not part of the Nissan recommended routine maintenance.cHoPs said:there is such a thing as a ga15.. second...wrong, u dont have to wait till u get a CEL to replace the sensor.. sensors are part of the tune up process. replaceable every 60K miles(CEL or not)
lshadoff said:Replacing the O2 sensor is not part of the Nissan recommended routine maintenance.
If you feel there is a problem with an O2 sensor even though the ECU has not detected a fault, the Factory Service Manual has procedures to test the O2 sensor which are not very difficult. They require a high impedance multimeter.
There are different ECU codes for the front and rear O2 sensor. What car/engine/code do you have?sentra305 said:but am confuse about one thing. My ecu says that the o2 sensor is open. Which brings me to think is it dead or just not getting electricity. Now another thing is that I dont knwo which one is bad the front or rear one. Either way am gonna change the Front one first.