P2A00 Infiniti Oxygen (O2) Sensor Circuit Range / Performance (Bank 1 – Sensor 1)
Possible causes
– Faulty Air fuel Ratio (A/F) Bank 1 Sensor 1
– Air fuel Ratio (A/F) Bank 1 Sensor 1 harness is open or shorted
– Air fuel Ratio (A/F) Bank 1 Sensor 1 circuit poor electrical connection
– Fuel pressure
– Fuel injector
– Intake air leaks
– Air fuel Ratio (A/F) Bank 1 Sensor 1 harness is open or shorted
– Air fuel Ratio (A/F) Bank 1 Sensor 1 circuit poor electrical connection
– Fuel pressure
– Fuel injector
– Intake air leaks
What about the obd code?
The P2A00 Infiniti Code is set when A/F sensor output voltage change value is below regular value against fuel trim change value.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P2a00 Description
The Air-Fuel ratio (A/F) sensor varies its output voltage in proportion to the air-fuel ratio. Based on the output voltage, the ECM determines if the air-fuel ratio is RICH or LEAN and adjusts the stoichiometric air-fuel ratio. The ECM also checks the fuel injection volume compensation value to check if the A/F sensor is deteriorating or not. A/F sensor response deterioration is determined by the ratio of the A/F sensor output voltage variation and fuel trim variation.
Infiniti Vehicle:Infiniti EX35,Infiniti FX35,Infiniti FX50,Infiniti G25,Infiniti G37,Infiniti M35,Infiniti M37,Infiniti M56,Infiniti QX562013 Infiniti,2012 Infiniti,2011 Infiniti,2010 Infiniti,2009 Infiniti,2008 Infiniti,2007 Infiniti,2006 Infiniti,2005 Infiniti,2004 Infiniti,2003 Infiniti,2002 Infiniti,2001 Infiniti,2000 Infiniti,1999 Infiniti,1998 Infiniti,1997 Infiniti,1996 Infiniti,