SES code P2A03

kittens · 05-23-2016, 02:49 PM

Hi everyone,

I have SES code P2A03. I have done some research and possible outcomes are:

dirty MAF/MAF is bad
Exhaust Leak
O2 Sensors

the only modification is my exhaust : Top speed Pro1. But, I have put the exhaust on the car well over a year ago and just got the code about a week ago.

I guess first step would be to clean the MAFs but has anyone had this code with a different issue that I have not mentioned?

Pintsize725 · 05-23-2016, 03:03 PM

I had this code, as well as multiple others, come up when I swapped back to stock from a full exhaust swap and tune. Turned out that my spark plugs had fouled up and caused the O2 sensors to fail. Needed to swap both sensors and new plugs to get it fixed.

Car was an 09 with 88k miles.

kittens · 05-23-2016, 03:46 PM

thanks, I am coming up on 61k so that may be the issue

05-23-2016, 02:49 PM	#1 (permalink)
kittens Enthusiast Member Join Date: May 2013 Location: Central NJ Posts: 412 Drives: 2009 Nissan 370Z Rep Power: 11	SES code P2A03 Hi everyone, I have SES code P2A03. I have done some research and possible outcomes are: dirty MAF/MAF is bad Exhaust Leak O2 Sensors the only modification is my exhaust : Top speed Pro1. But, I have put the exhaust on the car well over a year ago and just got the code about a week ago. I guess first step would be to clean the MAFs but has anyone had this code with a different issue that I have not mentioned?

05-23-2016, 03:03 PM	#2 (permalink)
Pintsize725 A True Z Fanatic Join Date: Jan 2012 Location: Austin Posts: 14,196 Drives: 2016 Mazda 6 Rep Power: 211844	I had this code, as well as multiple others, come up when I swapped back to stock from a full exhaust swap and tune. Turned out that my spark plugs had fouled up and caused the O2 sensors to fail. Needed to swap both sensors and new plugs to get it fixed. Car was an 09 with 88k miles. __________________ Tracie

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05-23-2016, 03:46 PM	#3 (permalink)
kittens Enthusiast Member Join Date: May 2013 Location: Central NJ Posts: 412 Drives: 2009 Nissan 370Z Rep Power: 11	thanks, I am coming up on 61k so that may be the issue