P2A00 code, HELP

cheshirecat · 06-12-2013, 09:42 AM

I would get a matched set of O2 sensors. There may be an electrical issue such as a higher draw on one versus the other or mismatched resistance which is causing the issue.

Kmccarthy714 · 06-12-2013, 08:32 PM

Quote:

Originally Posted by 1st

Any updates? I want to go this set up but don’t want to deal with a cell. I have heard so many people with just Stillen G3’s and CBE and getting a cell. Per their website it also states on the G2 description No Check Engine Light (CEL) Problems. But on the G3 description states nothing about a cell which intern means they are aware it can cause a cell. Anyways bro you have already determined it’s not the 02 sensors. Did you end up cleaning the Maf sensors?

Cleaned them light came back on after 50 miles

Kmccarthy714 · 06-12-2013, 08:33 PM

Quote:

Originally Posted by cheshirecat

I would get a matched set of O2 sensors. There may be an electrical issue such as a higher draw on one versus the other or mismatched resistance which is causing the issue.

The stock sensor is a denso. I got a denso sensor.

Niztalgic · 06-12-2013, 09:05 PM

I know of some people that have had either a clogged air filter, intake leak after the MAF or an exhaust leak. Also I would consider looking into the electrical connection at the connectors between wire harness and sensors on that side. Check for broken of crimped wires or prongs inside the plugs themselves.

Chuck33079 · 06-13-2013, 08:14 AM

Did the fuel trims change banks when you swapped the sensors?

Edit- read more carefully. The discrepancy is still on the same side. Time to look for vacuum leaks, etc.

Kmccarthy714 · 11-06-2013, 11:22 AM

Quote:

Originally Posted by Chuck33079

Did the fuel trims change banks when you swapped the sensors?

Edit- read more carefully. The discrepancy is still on the same side. Time to look for vacuum leaks, etc.

Ok to update still ahve the code cant find any problems at all. ONce the weather got cold i retrieved a P0300 code multi random misfire. Usally a Lean miss fire so im asuming im getting a lean miss which is caused by a vacuum leak between the A/F bank 1 sensor 1 and the MAF sensor?

Knives · 04-02-2014, 05:45 PM

Reviving this old thread. I finally got rid of this code once I installed high flow cats. To the guys running stock cats (but have other breather mods), you might want to consider an option that extends the 02 sensor out.

Kmccarthy714 · 05-23-2014, 12:41 PM

Quote:

Originally Posted by Knives

Reviving this old thread. I finally got rid of this code once I installed high flow cats. To the guys running stock cats (but have other breather mods), you might want to consider an option that extends the 02 sensor out.

They didnt delete the code is just went away on its own?

jonjiang · 06-27-2017, 11:20 AM

I had this code and my mechanic found a crack in my catalytic converter. He welded it up and the code went away. He explained that if there's a difference in the O2 sensors, then the code will be triggered. Since the crack let in fresh air, then there was a mismatch between the sensors, therefore the code was on.

Gixxerman · 08-01-2017, 09:34 PM

I just posted a comment about the PA200 code on another member's post that I was receiving. Through the process of elimination, I found out it was the gas (Royal Farms') I was using.

raps101 · 06-05-2020, 04:07 PM

I'm getting this code. Pa200 bank 1 sensor 1 (air/fuel ratio sensor). Changed the sensor with a brand new one from the Nissan dealer parts department/Nissan oem, code came back a few days later. Cleared it, and it came back again a few days later. Mechanic says he performed a smoke test to check for a vacuum leak. No dice. Someone else's 2 cents says this code is common on Nissans and he suggests there may be a small crack or cracks in the exhaust manifold causing leaks, or nuts broken/missing connecting the exhaust manifold to the engine. Anyone have any thoughts?

Sent from my SM-G965U using Tapatalk

06-12-2013, 09:05 PM	#34 (permalink)
Niztalgic Base Member Join Date: Jan 2012 Location: Mckinney TX Age: 41 Posts: 43 Drives: 10 370z nismo prl Rep Power: 13	I know of some people that have had either a clogged air filter, intake leak after the MAF or an exhaust leak. Also I would consider looking into the electrical connection at the connectors between wire harness and sensors on that side. Check for broken of crimped wires or prongs inside the plugs themselves. __________________ Hks hi pwr cbe - z1 cats - gtm stg1 sc - hks spark plugs - innovative afr gauge - defi boost gauge - Jwt oil pan spacer - 25 row oil cooler w/ spal fan and vented fender liner - z1 silicone hoses - uprev - specialty z clutch - 180 custom - VLEDS -ISS 20" complex 5 20" 275/325. Powertrix Coilovers

06-13-2013, 08:14 AM	#35 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29538	Did the fuel trims change banks when you swapped the sensors? Edit- read more carefully. The discrepancy is still on the same side. Time to look for vacuum leaks, etc. Smakov A. likes this. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent Last edited by Chuck33079; 06-13-2013 at 08:16 AM.

04-02-2014, 05:45 PM	#37 (permalink)
Knives Enthusiast Member Join Date: May 2009 Location: New York Posts: 293 Drives: 2009 370z 6MT Rep Power: 15	Reviving this old thread. I finally got rid of this code once I installed high flow cats. To the guys running stock cats (but have other breather mods), you might want to consider an option that extends the 02 sensor out. Smashley likes this. __________________ Mods list and pics Click

06-05-2020, 04:07 PM	#41 (permalink)
raps101 Base Member Join Date: Jun 2009 Location: New York Posts: 60 Drives: 09 Nissan 370z T/M6 Rep Power: 15	I'm getting this code. Pa200 bank 1 sensor 1 (air/fuel ratio sensor). Changed the sensor with a brand new one from the Nissan dealer parts department/Nissan oem, code came back a few days later. Cleared it, and it came back again a few days later. Mechanic says he performed a smoke test to check for a vacuum leak. No dice. Someone else's 2 cents says this code is common on Nissans and he suggests there may be a small crack or cracks in the exhaust manifold causing leaks, or nuts broken/missing connecting the exhaust manifold to the engine. Anyone have any thoughts? Sent from my SM-G965U using Tapatalk Last edited by raps101; 06-05-2020 at 08:59 PM.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
P2A00 Code: Won't Turn Off	daisi145	Engine & Drivetrain	2	05-25-2013 07:38 PM
Check Engine Code P2A00	pulser8	Engine & Drivetrain	10	02-20-2013 01:18 AM
CEL code: P2A00 er	gaveup	Engine & Drivetrain	11	03-29-2012 02:32 PM
CEL Code - P2A00	evse82	Intake/Exhaust	21	03-01-2012 05:53 PM
Throwing code P2A00 after installing stock cats	ArtVandaleigh	Engine & Drivetrain	8	11-03-2010 05:48 PM

06-12-2013, 09:42 AM	#31 (permalink)
cheshirecat A True Z Fanatic Join Date: Jan 2009 Location: Florida Posts: 1,428 Drives: N54 135i Rep Power: 292	I would get a matched set of O2 sensors. There may be an electrical issue such as a higher draw on one versus the other or mismatched resistance which is causing the issue.

06-27-2017, 11:20 AM	#39 (permalink)
jonjiang Base Member Join Date: May 2009 Location: NorCal Posts: 17 Drives: 09 370z Black M6 Rep Power: 15	I had this code and my mechanic found a crack in my catalytic converter. He welded it up and the code went away. He explained that if there's a difference in the O2 sensors, then the code will be triggered. Since the crack let in fresh air, then there was a mismatch between the sensors, therefore the code was on.

08-01-2017, 09:34 PM	#40 (permalink)
Gixxerman Base Member Join Date: Jan 2016 Location: Delaware Posts: 24 Drives: 2009 370Z Grey Rep Power: 9	I just posted a comment about the PA200 code on another member's post that I was receiving. Through the process of elimination, I found out it was the gas (Royal Farms') I was using.