O2 and A/F Sensor Readings - I need an armchair diagnosis! HELP!

fitxpert

Just an update. I brought the car in to have them hook it up to CONSULT and test everything and was told nothing was wrong with the car. This was after we had it hooked to the Modis and determined the catalytic converter was going bad.

A few weeks went by and I ended up having code P2A00 stick in May. This was really just the beginning of my problems. The dealer replaced the AFR sensor, because they finally were able to pull the code, but weren't willing to replace the catalytic converter. Several weeks later, same code, and another AFR sensor along with a new intake manifold because the one they put in previously seized into the manifold... A few months went by, and then, boom there's the same code again.

I finally called Nissan Corporate. We're headed into Federal Lemon Law territory...

The light stayed on for about 6 weeks, and the Sunday before my Tuesday meeting with the Engineer sent by Nissan - it went off. The car did something really weird, it had a slow start and my headunit's screen was flashing as if it were shorting out. I got a little worried, but figured we would be able to pull the code at my appointment.

Anyway - at the meeting, the engineer (who looked exactly like Heisenberg, and was a really cool guy) hooked up his CONSULT and low and behold couldn't find any evidence of a stored P2A00. My saving grace was the Low Battery code that was stored. I told him what happened, and he said it probably reset. We went on our merry way and drove around for a good hour, and of course, I almost couldn't replicate the symptoms. It was just way too cool outside.

When we got back to the dealership, Heisenberg gave his recommendations...and in a nutshell, told them I was right all along. He said the catalytic converter wasn't working worth a darn, and that the Z has to be treated as if it has two 3 cylinder engines. He advised replacing the catalytic converter, both rear O2 sensors, and the AFR sensor that was not replaced.

Further, he recommend they replace the CSC as well, because I was still losing fluid after having one instance of clutch pedal sticking to the floor, and replacing the clutch fluid with GTR fluid.

Hopefully, when I get her back in a few days, she'll be good as new and I can move forward with the original "plan."

Thanks everyone for chiming in, and I hope this helps others down the road.