P2A00 - A/F Sensor Circuit Range/Performance (bank 1 sensor 1)

BBRSpeedWorks

Ooo sorry my fault..

jwick

It happens. I'm actually going to remove my post cats too as it appears to make the idle AFR better.

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'10 G37T 6MT Graphite/Graphite - BP - G37T Build

BBRSpeedWorks

after you get rid of the cat there pointless...

GaleForce

I had this code with the base map. My tuner said this was a common issue with a turbo'd 370z. They smoke tested the intake and a predyno checkout, everything checked out a-ok. They ended up disabling the P2A00 code in my final tune.

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jwick

Good to know. I emailed JTran to see what he thinks we should do.

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'10 G37T 6MT Graphite/Graphite - BP - G37T Build

GaleForce

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09 Nismo#400

I have also disabled this code (P2A00) in my tune, and I have not had any problems with it off.

gomer_110

Same here.

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'17 Titan Bone Stock

puckshaw

I have this code and a random misfire code occasionally. I've barely been driving the car and was still searching for a solid fix. Planning on replacing the sensor soon but don't have a lot of confidence that will fix the issue. May wind up just disabling the code as others have done.

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jwick

Did you start getting the random misfire code after you upgrade the clutch/flywheel. As I understand it the sensor is so sensitive that the chatter of the tranny and lightweight flywheel, along with a higher than stock idle rpm, will set it off. I got that code when I first installed the kit. I had my tuner turn down the sensitivity on the sensor that trips that code and I've had no issues since. If I recall properly he just lowered the sensitivity under 1500 rpms.

Sounds like I'll disable it too if I can't find an actual cause. I'm going in for a retune in a couple months anyway so my tuner will have a few days to play with it and get it dialed correctly.

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Liquid_G

I had this exact same code last year. GTM Stg1 SC. turned out to be a bad injector. one was barely firing and the others were dumping a **** ton of fuel to compensate. Might be worth looking into.

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Mitco39

Keep in mind Jwick that most if not all tuners turn off the misfire code. So if one cylinder is misfiring you wouldn't otherwise know it. When I turn on my launch control I cut fuel so that cylinders misfire, the with that code off thinks everything is just fine.

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2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me
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jwick

Mine isn't turned off. JTran just reduced the sensitivity of the random misfire portion below 1500rpms. I haven't had that code pop up since he adjusted it. The rest of the misfire codes are still OEM settings.

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Mitco39

But is there a chance that your issue lies below 1500rpms?

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2007 Chevy Duramax - EFILive Tuned By Me
2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me
The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her
My Build --> http://www.the370z.com/members-370z-...39s-build.html

jwick

Maybe I'm missing something. Only the random misfire code was messed with. The other individual cylinder misfire codes are still active. If I had a true misfire wouldn't a specific cylinder code pop up?

It is possible my issue is below 1500rpms, and I was below when it tripped the code this time around. The code popped up when I pulled up to the stop light and the idle hiccup happened (BP guys know exactly what I'm talking about). I had just left the work parking garage so the car wasn't really warm yet. The rpms dipped lower than on a 'typical' hiccup and the code came on. My thought is as it stumbled (hiccupped) the rpms dropped lower than normal and left it in a lean AFR state that tripped the code. All the parameters I've checked are spot on. All the bank readings are the same for each parameter except the sensor heater voltage (which Bank 1 is about 25% lower than Bank 2). Car runs find, idles fine, and in slight boosting applications it operates fine. I've not given it a WOT until I can absolutely confirm everything.

I picked up a new can of carb cleaner and I'll check the intake piping this weekend.

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