Nissan 370Z Forum - Both fwd O2 sensors?

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Quote:

Originally Posted by conor1123 (Post 2796037)

WOW! I have been throwing the same code for over a year now and I'm still trying to figure it out. I had a buddy check up on that code and apparently in some cases a small exhaust leak can cause it.

I'll be tightening down my exhaust here this week and clearing the code to see if it helps.

But yeah, I went to bring my car to the dealer thinking it was just a bad o2 sensor but the tech blamed it on my HFC because of the anti fouler bung....:shakes head:
He said the rear sensors were throwing off the front. Uhhhh, I don't think so Mr.'Certified' Nissan Tech or their 'top' tech as they called him. I was lucky enough to have a nice service guy because he waived my $85 inspection fee because he knew it was a bulls*** diagnosis.

I was actually going to post up on here soon if tightening the exhaust didn't work to see if anyone knew the problem.

Mine aren't bad, but I throw a code (same one every time) every so often. When I first threw it I took it in and they refused service, because they said I lengthened the O2 sensor wire...

Why would I lengthen it? If it was any longer it'd be hanging down and potentially get caught on something I drive over, or rub on the road. :rolleyes:

I might try to tighten my exhaust... It couldn't hurt.

Update. It is an exhaust leak caused by warped flange by my Berk HFCs. I installed thicker gasket material (hand cut) but I think I'm going to have to remove the cats and have them machined flat so that the gaskets can seat/seal

Here is what the old gaskets looked like when I pulled them out.

http://www.the370z.com/members/surfd...fc-gasket.html

here is the zspeed gasket installed with some high temp gasket sealant.
Nissan 370Z Forum - SurfDog's Album: Surfdog 09 370z sport - Picture

its a tight fit under there using jack stands, but if I can do it anybody can (you need an impact gun to get the heat cycled exhaust bolts loose. Fortunately, I did not have to cut any of them. They get corroded REALLY fast with all that heat.)
Nissan 370Z Forum - SurfDog's Album: Surfdog 09 370z sport - Picture

no more codes!

Interesting. When I had HFCs + exhaust leaks, due to no gaskets, I was throwing P0420 and P0430.

With the LTHs I just threw a P2098 though, grrr! I need to get this thing tuned.

Also, love the HF floor jack! I was concerned when purchasing mine a few years ago, but I have had no issues with it while doing work on several vehicles.