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-   -   P2A00 & P0300 Codes (http://www.the370z.com/engine-drivetrain/81763-p2a00-p0300-codes.html)

Kmccarthy714 11-06-2013 08:51 AM

P2A00 & P0300 Codes
 
Whats up guys, as my title states i have a P2A00 code(which was on the car when i bought it) and recently since weather changed and got colder i throw a P0300 code.

I Bought the car with Stillen G3's and Stillen Catback exhaust, i assumed A/F sensor for the first code and installed it right after buying the car, i was wrong. After researching found it could be related to the intakes themselves or a air leak of sorts so i left it alone for a while until i could get to the tuner. Now i have throw this P0300 code to go along with the P2A00. Ive noticed my idle has gone up to about 1k with the random miss. Am I right in assuming both codes are related? and if so that they are either being related to the intakes themselves(not likely it would be both banks) or a vacuum leak on the intake side between the MAF and AF bank 1 sensor 1? Whats the easiest way to check for leaks, what is most common and what other things should i look for. Any help would be greatly appreciated.

SouthArk370Z 11-06-2013 10:18 AM

P0300 is a random misfire code, possibly caused by whatever is causing the P2A00. Possible causes of P2A00:
  • Air Fuel Ratio (A/F) Sensor Bank 1 Sensor 1
  • Air Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 harness is open or shorted
  • Air Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 circuit poor electrical connection
  • Fuel pressure
  • Fuel injector
  • Intake air leaks
Read more: P2a00 Nissan Air Fuel Ratio Sensor Circuit Range/Performance Bank 1 Sensor 1 OBDII Engine Light Trouble Code | Engine-Codes.com

Kmccarthy714 11-06-2013 10:28 AM

Quote:

Originally Posted by SouthArk370Z (Post 2557543)
P0300 is a random misfire code, possibly caused by whatever is causing the P2A00. Possible causes of P2A00:
  • Air Fuel Ratio (A/F) Sensor Bank 1 Sensor 1
  • Air Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 harness is open or shorted
  • Air Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 circuit poor electrical connection
  • Fuel pressure
  • Fuel injector
  • Intake air leaks
Read more: P2a00 Nissan Air Fuel Ratio Sensor Circuit Range/Performance Bank 1 Sensor 1 OBDII Engine Light Trouble Code | Engine-Codes.com

I replaced the A/F but and the connections and wires all looked good. so im shying away from that, the guy i bought it from told me the P2A00 came up after the intakes were installed and then supposdely got it tuned and it came back after the tune.


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