CaptnInsaneO

Update Dos... After doing an hour + of loops on a stretch of highway the Heated O2 sensor status finally updated to "Completed" in the scan tool. A few minutes later the Heated Catalyst updated to Completed too and then the computer promptly threw a P0430 code. Sigh... [/facepalm] I ordered a set of Walker downstream cats last night & they should be delivered Saturday. If they don't fix the issue anyone want to buy an offroad only '02 Pathfinder?!

Update... Got my code scanner connected this weekend and the thing had a pending P0430 but no active codes being thrown or archived. Checking the voltage readings for the O2 sensors, Bank 2 / Sensor 2 was "stuck" a 0.24 volts with no other activity. Voltage output from the other O2 sensors was cycling up & down as it should. We replaced the Bank 2 downstream, drove the vehicle for roughly 20 miles and then scanned it again. The pending P0430 was gone and Bank 2 / Sensor 2's volts were cycling like the other 3 sensors. Boy-O took it for another inspection attempt yesterday and it failed again for O2 not ready. Digging a little deeper into the scanner data, it shows that readiness for Heated Catalyst and Heated O2 are "not completed". The pending code has not come back, so is it just a matter of driving more miles? (and continue risking getting several tickets) What could cause the O2's to never achieve readiness yet not throw a trouble code?

Thanks for the reply. This is my 18 year old son's vehicle, so I am pretty sure he didn't think to plug a scan tool in before hand. He claims there haven't been any codes to reset & he was told to drive it for at least 30 minutes before taking it to the inspection place. I should be able to check the Pathfinder first hand later this week.

2002 Pathfinder, runs great & no CEL's but it keeps failing TX emissions test because the O2 sensors show as not ready on the shop's scanner. Thoughts? Thank You, El Kapitan de loco