P2254 Infiniti Oxygen (O2) Sensor Negative Current Control Circuit / Open (Bank 2 – Sensor 1)
Possible causes
– Rear Air/Fuel Ratio Sensor Bank 2 Sensor 1 harness is open or shorted
– Rear Air/Fuel Ratio Sensor Bank 2 Sensor 1 circuit poor electrical connection
– Faulty Rear Air/Fuel Ratio Sensor Bank 2 Sensor 1
– Rear Air/Fuel Ratio Sensor Bank 2 Sensor 1 circuit poor electrical connection
– Faulty Rear Air/Fuel Ratio Sensor Bank 2 Sensor 1
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P2254 Infiniti Description
The rear air/fuel ratio (A/F) sensor (bank 2, sensor 1) is installed in the exhaust manifold and detects oxygen content in the exhaust gas. The rear A/F sensor transmits a signal to the powertrain control module (PCM), and it enables overall feedback control. The PCM controls fuel injection duration by comparing the target air/fuel ratio with the rear A/F sensor signal. When the VSB1 terminal voltage is more than a specified value for a predetermined time, the PCM detects a malfunction and stores a DTC.
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,