P2A00 code, HELP

Kmccarthy714 · 06-03-2013, 01:50 PM

Hey guys, I have a P2A00(A/F bank 1 performance) code. I replaced the sensor with a Denso sensor, cleared the code and the code came back 2 days later. Any ideas?

F.Y.I I bought the car with Stillen Cat backs and Stillen Gen 3 intakes on it already

SS_Firehawk · 06-03-2013, 02:22 PM

You are running two different branded O2 sensors?

cheshirecat · 06-03-2013, 03:50 PM

no test pipes/hfc's?

SPOHN · 06-03-2013, 04:05 PM

There's a lot of info on this code. Exhaust leak and dirty MAF's seem to be the top two problems. There's more that can cause it.

1st · 06-03-2013, 04:11 PM

Quote:

Originally Posted by cheshirecat

no test pipes/hfc's?

Have you confirmed this.

cheshirecat · 06-03-2013, 04:47 PM

Quote:

Originally Posted by 1st

Have you confirmed this.

note the question mark- I was asking the OP.

Kmccarthy714 · 06-03-2013, 05:29 PM

No test pipes or hfc and I just replaced the stock o2 with a Denso o2 on the passanger side

1st · 06-03-2013, 05:42 PM

Quote:

Originally Posted by cheshirecat

note the question mark- I was asking the OP.

I know that smart guy. Im confirming this with the op to make sure he has looked. Don't flatter yourself.

SS_Firehawk · 06-03-2013, 06:04 PM

Quote:

Originally Posted by Kmccarthy714

No test pipes or hfc and I just replaced the stock o2 with a Denso o2 on the passanger side

Aftermarket sensors may read differently from the stock ones. If you are running mismatched O2 sensors, it is very possible and likely to throw a code because your ECU is seeing a voltage variance. I would either replace your other O2 sensor with a Denso, or replace the Denso with a stock one. Just make sure they match.

Kmccarthy714 · 06-03-2013, 07:00 PM

Ok, tommorow at my shop I will use the scan tool to read voltages of both o2 sensors and get back to you guys I will also clean my MAF sensor. Thanks for the feedback to this point

cheshirecat · 06-04-2013, 01:55 PM

Quote:

Originally Posted by 1st

I know that smart guy. Im confirming this with the op to make sure he has looked. Don't flatter yourself.

Kmccarthy714 · 06-04-2013, 03:52 PM

Checked with my scan tool found bank 1 fuel percentages at 22 and bank 2 fuel percentages at 7 thinkong I need a MAF in bank 1 so I'm swaping sensors and rechecking

Chuck33079 · 06-04-2013, 03:54 PM

Stupid question, but have you cleaned the MAFs yet? It's far cheaper than the alternatives.

sixpax · 06-04-2013, 03:58 PM

Quote:

Originally Posted by Chuck33079

Stupid question, but have you cleaned the MAFs yet? It's far cheaper than the alternatives.

I think he means he is going to swap them and retest to see if that confirms a bad or dirty MAF.

Chuck33079 · 06-04-2013, 03:59 PM

Might as well hit them with maf cleaner while they're out. Can't hurt.

06-03-2013, 01:50 PM	#1 (permalink)
Kmccarthy714 Base Member Join Date: May 2013 Location: Orange County, NY Posts: 77 Drives: 09 Brilliant Silver Rep Power: 12	P2A00 code, HELP Hey guys, I have a P2A00(A/F bank 1 performance) code. I replaced the sensor with a Denso sensor, cleared the code and the code came back 2 days later. Any ideas? F.Y.I I bought the car with Stillen Cat backs and Stillen Gen 3 intakes on it already Last edited by Kmccarthy714; 06-03-2013 at 01:59 PM.

06-03-2013, 02:22 PM	#2 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7335	You are running two different branded O2 sensors? __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction

06-03-2013, 04:05 PM	#4 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 45 Posts: 14,844 Drives: Waiting on next Z Rep Power: 221	There's a lot of info on this code. Exhaust leak and dirty MAF's seem to be the top two problems. There's more that can cause it. DEpointfive0 likes this. __________________

06-04-2013, 03:54 PM	#13 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29539	Stupid question, but have you cleaned the MAFs yet? It's far cheaper than the alternatives. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

06-04-2013, 03:59 PM	#15 (permalink)
Chuck33079 A True Z Fanatic Join Date: Nov 2011 Location: Houston Posts: 12,265 Drives: 2011 370ztt Rep Power: 29539	Might as well hit them with maf cleaner while they're out. Can't hurt. cheshirecat and SouthArk370Z like this. __________________ 2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

06-03-2013, 03:50 PM	#3 (permalink)
cheshirecat A True Z Fanatic Join Date: Jan 2009 Location: Florida Posts: 1,428 Drives: N54 135i Rep Power: 292	no test pipes/hfc's?

06-03-2013, 05:29 PM	#7 (permalink)
Kmccarthy714 Base Member Join Date: May 2013 Location: Orange County, NY Posts: 77 Drives: 09 Brilliant Silver Rep Power: 12	No test pipes or hfc and I just replaced the stock o2 with a Denso o2 on the passanger side

06-03-2013, 07:00 PM	#10 (permalink)
Kmccarthy714 Base Member Join Date: May 2013 Location: Orange County, NY Posts: 77 Drives: 09 Brilliant Silver Rep Power: 12	Ok, tommorow at my shop I will use the scan tool to read voltages of both o2 sensors and get back to you guys I will also clean my MAF sensor. Thanks for the feedback to this point

06-04-2013, 03:52 PM	#12 (permalink)
Kmccarthy714 Base Member Join Date: May 2013 Location: Orange County, NY Posts: 77 Drives: 09 Brilliant Silver Rep Power: 12	Checked with my scan tool found bank 1 fuel percentages at 22 and bank 2 fuel percentages at 7 thinkong I need a MAF in bank 1 so I'm swaping sensors and rechecking

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
P2A00 Code: Won't Turn Off	daisi145	Engine & Drivetrain	2	05-25-2013 08:38 PM
Check Engine Code P2A00	pulser8	Engine & Drivetrain	10	02-20-2013 02:18 AM
CEL code: P2A00 er	gaveup	Engine & Drivetrain	11	03-29-2012 03:32 PM
CEL Code - P2A00	evse82	Intake/Exhaust	21	03-01-2012 06:53 PM
Throwing code P2A00 after installing stock cats	ArtVandaleigh	Engine & Drivetrain	8	11-03-2010 06:48 PM