OBD codes for running lean

DeliriousClam

I'm running out of ideas. I had an ecuTek tune back in august for my HFC's, exhaust, and Stillen intakes and everything was cool (everything was fine before having the tune as well.)

Back in October, I installed test pipes but did no re-tune so codes for banks 1&2 running lean which I expected.

Now I've swapped out my test pipes for high flows again along with new o2 sensors and it's still throwing those codes which confuses the hell out of me.

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Stillen, AAM, Shine Auto, Fujimora, Swift, EVO-R, Carbon Fiber Element, Nitrous Outlet
MECP Advanced: CEA26671
Most of what I post here are artistic works of fiction and falsehood. Only a fool would take anything I post here as fact.

gomer_110

What is/are the actual code(s)? There's more than one lean code so it would help determine what to check.

Simple things to check/try is:
1. Look for leaks in the intake and exhaust from the MAF sensors all the way to the
primary O2 sensors.
2. Clean the MAF sensors.

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'11 370Z Nismo #528 Fast Intentions | Stillen | Motordyne | Uprev | CSF | Zspeed | Z1 Motorsports | AST | Swift | SPC | SPL | Whiteline | Hotchkis | Bride | Schroth | Robispec | Cusco | Nismo | Volk | Forgestar | Hoosier | RJM
'17 Titan Bone Stock

DeliriousClam

p0123 p0223

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Stillen, AAM, Shine Auto, Fujimora, Swift, EVO-R, Carbon Fiber Element, Nitrous Outlet
MECP Advanced: CEA26671
Most of what I post here are artistic works of fiction and falsehood. Only a fool would take anything I post here as fact.

gomer_110

Those aren't codes for running lean. They're codes related to the throttle position sensors according to google. Are all the wiring connectors plugged in and seated correctly?

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'11 370Z Nismo #528 Fast Intentions | Stillen | Motordyne | Uprev | CSF | Zspeed | Z1 Motorsports | AST | Swift | SPC | SPL | Whiteline | Hotchkis | Bride | Schroth | Robispec | Cusco | Nismo | Volk | Forgestar | Hoosier | RJM
'17 Titan Bone Stock

DeliriousClam

Sorry I made this thread when I was half asleep. The codes are p2096 and p2098

What raises further questions is that the AFR while cruising is right around 14.1

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Stillen, AAM, Shine Auto, Fujimora, Swift, EVO-R, Carbon Fiber Element, Nitrous Outlet
MECP Advanced: CEA26671
Most of what I post here are artistic works of fiction and falsehood. Only a fool would take anything I post here as fact.

gomer_110

Others that had your problem

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'11 370Z Nismo #528 Fast Intentions | Stillen | Motordyne | Uprev | CSF | Zspeed | Z1 Motorsports | AST | Swift | SPC | SPL | Whiteline | Hotchkis | Bride | Schroth | Robispec | Cusco | Nismo | Volk | Forgestar | Hoosier | RJM
'17 Titan Bone Stock

SouthArk370Z

Those are post-cat codes. IIRC, post-cat O2 sensors are not used for engine management - they are to check operation of cats. Shouldn't cause any problems as long as the pre-cat sensors are working properly - unless you need to pass an emissions test.

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DeliriousClam

I need to pass an emissions test. No idea what to do. Any way to trick it?

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Stillen, AAM, Shine Auto, Fujimora, Swift, EVO-R, Carbon Fiber Element, Nitrous Outlet
MECP Advanced: CEA26671
Most of what I post here are artistic works of fiction and falsehood. Only a fool would take anything I post here as fact.

DeliriousClam

Said in the first post that my car was already tuned for the HFC,CAI, and exhaust set-up. Swapped to test pipes for a few months now back to the same high flows. Still getting the same codes.

Trust me that was the first thing I saw when I searched and doesn't really apply too much to my situation.

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Stillen, AAM, Shine Auto, Fujimora, Swift, EVO-R, Carbon Fiber Element, Nitrous Outlet
MECP Advanced: CEA26671
Most of what I post here are artistic works of fiction and falsehood. Only a fool would take anything I post here as fact.

SouthArk370Z

AFAIK, there is no way to trick the system.

If nobody comes up with an answer soon, I'd hit the FSM.

A re-tune with a bit richer mixture might fix the problem.

Keep in mind that after you get things fixed you will have to go through several drive cycles (details in FSM) before the emissions system will report being ready.

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Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

DeliriousClam

fuuuck

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Stillen, AAM, Shine Auto, Fujimora, Swift, EVO-R, Carbon Fiber Element, Nitrous Outlet
MECP Advanced: CEA26671
Most of what I post here are artistic works of fiction and falsehood. Only a fool would take anything I post here as fact.

DeliriousClam

This is really annoying because this is the exact same set-up I had it tuned on

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Stillen, AAM, Shine Auto, Fujimora, Swift, EVO-R, Carbon Fiber Element, Nitrous Outlet
MECP Advanced: CEA26671
Most of what I post here are artistic works of fiction and falsehood. Only a fool would take anything I post here as fact.

SouthArk370Z

I didn't catch that part. My only guess is that the sensors have deteriorated due to no cats. Can you monitor the sensor output?

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Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub
Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

Zat_Zuma

Extend the A/F secondary O2 probes with Exhaust O2 extenders which are available at most local speed shops. Unplug battery to reset codes and you should be done.

If that fails; take it to a speed shop and bend over

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[B]2009 & 2017 370Z Touring Sport Autos SOLD

DeliriousClam

I put on brand new o2 sensors when I put the cats back on.

I'm going to try cleaning my MAF's and injectors

__________________
Stillen, AAM, Shine Auto, Fujimora, Swift, EVO-R, Carbon Fiber Element, Nitrous Outlet
MECP Advanced: CEA26671
Most of what I post here are artistic works of fiction and falsehood. Only a fool would take anything I post here as fact.