p2a03

Justin1686 · 07-23-2018, 11:47 AM

So, I went on a trip to Vermont, and in Stowe, there was a road that was RIPPED apart with insane gravel as they were doing construction. There was absolutely no way around this insane road. Mid-way through the 1/4 mile length of hell, my Service Engine Soon light comes on. I'm thinking I throw a sensor. Drive the car back to NY, light still on.

Bring to mechanic my dad has been using for 20 years, told it's an engine bay sensor, but didn't write down the code. Hooked up a reader today from a friend, and it gives me code P2A03 :detected the bank 2 sensor 1 heated oxygen sensor performance was not within acceptable limits.

I have mods on my car, including Berk cats and full exhaust (NOT test pipes). I've read so many posts saying it's due to the cats, but I've never had an issue in the 9 years I've had the car with the sensor. Mechanic said it's one sensor and is easy fix, I fear it being worse.

Any feedback suggestions?

Thanks.

Haiblykwhoa · 07-26-2018, 09:09 AM

it may be your MAF sensor. Thats what the nissan dealership told me. if cleaning it doesn't work try replacing it

JLarson · 07-26-2018, 09:42 AM

Can also be the O2 sensor dying. This does happen on our vehicles.

Justin1686 · 07-26-2018, 08:56 PM

thanks. I'll check into cleaning the MAF sensor.

See, my thing with the o2 sensor is due to the conditions it just doesn't make sense even though I know it's a 'thing'.

appreciate the help.

SouthArk370Z · 07-26-2018, 10:51 PM

Quote:

Originally Posted by Justin1686

thanks. I'll check into cleaning the MAF sensor.

Cleaning the MAFs is a very simple job that only takes about 5 minutes per side. I'd go ahead and do it "just because." A screwdriver and a can of MAF cleaner are all that are required.

Quote:

Originally Posted by Justin1686

See, my thing with the o2 sensor is due to the conditions it just doesn't make sense even though I know it's a 'thing'.

The sensors are sensitive to shock (never use an impact wrench to remove). If the sensor was marginal, shock from getting hit by gravel could have pushed it over the edge. But it could be something related to your tune (eg, MAFs, cats, etc) getting rattled around a little too much.

Quicksilvers · 07-27-2018, 02:52 AM

Clean your MAF sensor with CRC Mass Air Flow Sensor Cleaner it is good preventative maintenance. Just be careful cleaning the MAF sensor it is delicate.

JLarson · 07-27-2018, 07:02 AM

Quote:

Originally Posted by Justin1686

thanks. I'll check into cleaning the MAF sensor.

See, my thing with the o2 sensor is due to the conditions it just doesn't make sense even though I know it's a 'thing'.

appreciate the help.

It didn't make sense on my 350z either when it happened, and it didn't make sense on my 370z when it happened, but it still happened and it was still fixed by replacing the sensor

YMMV.

07-23-2018, 11:47 AM	#1 (permalink)
Justin1686 Track Member Join Date: Apr 2009 Location: Nassau, NY Age: 37 Posts: 689 Drives: 09 370 PG AT Rep Power: 17	p2a03 So, I went on a trip to Vermont, and in Stowe, there was a road that was RIPPED apart with insane gravel as they were doing construction. There was absolutely no way around this insane road. Mid-way through the 1/4 mile length of hell, my Service Engine Soon light comes on. I'm thinking I throw a sensor. Drive the car back to NY, light still on. Bring to mechanic my dad has been using for 20 years, told it's an engine bay sensor, but didn't write down the code. Hooked up a reader today from a friend, and it gives me code P2A03 :detected the bank 2 sensor 1 heated oxygen sensor performance was not within acceptable limits. I have mods on my car, including Berk cats and full exhaust (NOT test pipes). I've read so many posts saying it's due to the cats, but I've never had an issue in the 9 years I've had the car with the sensor. Mechanic said it's one sensor and is easy fix, I fear it being worse. Any feedback suggestions? Thanks. __________________ 2009 Touring & Sport Package \|\| Platinum Graphite \|\| 40% 3M Tint \|\| Xpel Clear Bra \|\| Berk CBE \|\| Berk HFC \|\| Stillen Sway Bar \|\| H&R Spacers \|\| Swift Springs \|\| SPC Rear Camber Kit \|\| Thanks to Savage Autosports, VTR, PM, and R.A.D.

07-26-2018, 09:42 AM	#3 (permalink)
JLarson A True Z Fanatic Join Date: Jun 2017 Location: Media, PA Posts: 4,074 Drives: 14 Nissan 370z MR M6 Rep Power: 2684369	Can also be the O2 sensor dying. This does happen on our vehicles. __________________ 2014 370z Touring Sport Magma Red MT // BP Single Turbo 6467 // 63mm TB's // Z1 Ported Upper Mani // RJM Pedal // Zspeed Stage 3 Clutch // 526 WHP, 451 WTQ 2006 350z (Sold) // 1990 300zx (Sold) // 1985 300zx 2+2 (Sold)

07-26-2018, 08:56 PM	#4 (permalink)
Justin1686 Track Member Join Date: Apr 2009 Location: Nassau, NY Age: 37 Posts: 689 Drives: 09 370 PG AT Rep Power: 17	thanks. I'll check into cleaning the MAF sensor. See, my thing with the o2 sensor is due to the conditions it just doesn't make sense even though I know it's a 'thing'. appreciate the help. __________________ 2009 Touring & Sport Package \|\| Platinum Graphite \|\| 40% 3M Tint \|\| Xpel Clear Bra \|\| Berk CBE \|\| Berk HFC \|\| Stillen Sway Bar \|\| H&R Spacers \|\| Swift Springs \|\| SPC Rear Camber Kit \|\| Thanks to Savage Autosports, VTR, PM, and R.A.D.

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07-26-2018, 09:09 AM	#2 (permalink)
Haiblykwhoa Base Member Join Date: Jan 2015 Location: Mobile Posts: 8 Drives: 2013 MT/370 Rep Power: 10	it may be your MAF sensor. Thats what the nissan dealership told me. if cleaning it doesn't work try replacing it

07-27-2018, 02:52 AM	#6 (permalink)
Quicksilvers A True Z Fanatic Join Date: May 2017 Location: Atlanta, GA Posts: 2,039 Drives: 2017 370z Rep Power: 25462	Clean your MAF sensor with CRC Mass Air Flow Sensor Cleaner it is good preventative maintenance. Just be careful cleaning the MAF sensor it is delicate.