Both fwd O2 sensors?

Haboob · 04-29-2014, 08:06 AM

Quote:

Originally Posted by conor1123

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....

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.

SurfDog · 05-05-2014, 08:18 PM

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

SurfDog · 05-29-2014, 06:39 PM

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

SurfDog · 07-02-2014, 08:15 AM

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!

aszyd · 07-02-2014, 08:53 AM

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.

05-05-2014, 08:18 PM	#17 (permalink)
SurfDog A True Z Fanatic Join Date: May 2012 Location: Colorado (9000 feet) Age: 56 Posts: 1,793 Drives: 09 6mt, 13 Sequoia, Rep Power: 15748	I might try to tighten my exhaust... It couldn't hurt. __________________ 09 6spd Berk CBE, JWT cams, ZSpeed CSC, Stillen (25 row oil, brake cooling, sways, gen3 CAI), Passport (9500ci), Quaife LSD, Z1 400 hp kit, ss lines, pads, rotors, clutch etc, Phunk's pan and fuel starve fix

05-29-2014, 06:39 PM	#18 (permalink)
SurfDog A True Z Fanatic Join Date: May 2012 Location: Colorado (9000 feet) Age: 56 Posts: 1,793 Drives: 09 6mt, 13 Sequoia, Rep Power: 15748	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 __________________ 09 6spd Berk CBE, JWT cams, ZSpeed CSC, Stillen (25 row oil, brake cooling, sways, gen3 CAI), Passport (9500ci), Quaife LSD, Z1 400 hp kit, ss lines, pads, rotors, clutch etc, Phunk's pan and fuel starve fix

07-02-2014, 08:15 AM	#19 (permalink)
SurfDog A True Z Fanatic Join Date: May 2012 Location: Colorado (9000 feet) Age: 56 Posts: 1,793 Drives: 09 6mt, 13 Sequoia, Rep Power: 15748	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! jpkirk and aszyd like this. __________________ 09 6spd Berk CBE, JWT cams, ZSpeed CSC, Stillen (25 row oil, brake cooling, sways, gen3 CAI), Passport (9500ci), Quaife LSD, Z1 400 hp kit, ss lines, pads, rotors, clutch etc, Phunk's pan and fuel starve fix Last edited by SurfDog; 07-02-2014 at 08:18 AM.

07-02-2014, 08:53 AM	#20 (permalink)
aszyd Track Member Join Date: May 2014 Location: Florida Posts: 877 Drives: Magma Red 370z T+S Rep Power: 20	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. SurfDog likes this. __________________ Competition Clutch\|Fast Intentions\|Maxbore\|NST\|Setrab\|Stillen\|Tomei\|Uprev\| Z1 Avant Garde\|SPC\|Stance\|Whiteline Aerojacket\|Seibon\|Tanabe\|TRS\|TWM

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