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P0031

P0031 - HO2S Heater Control Circuit Low Bank 1 Sensor 1

Possible causes
- Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 harness is open shorted to ground
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit poor electrical connection
- Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse
- Faulty Engine Control Module (ECM)
Tech notes
The code means that there is a problem with the heater element circuit of the heated oxygen sensor. Water getting inside the heated oxygen sensor connector can caused the heated oxygen sensor fuse to blow, which is a very common problem for this type codes. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors.

HO2S Heater Control Circuit Low Bank 1 Sensor 1 is the generic definition for the P0031; however your vehicle's manufacturer may have a different definition and information for the P0031 code.
When is the code detected?
The P0031 is set when the ECM detects an excessively low voltage through the heated oxygen sensor heater circuit
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0031 Description
Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. The faster the heated oxygen sensor reaches that temperature the faster the sensor will start sending an accurate signal to the Engine Control Module (ECM).
In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECM controls the heater element circuit by allowing current flow to ground.
The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.
OBDII Code P0031 - HO2S Heater Control Circuit Low Bank 1 Sensor 1
P0031 For specific makes
P0031 AUDI
P0031 BMW
P0031 CHRYSLER
P0031 DODGE
P0031 HYUNDAI
P0031 INFINITI
P0031 INFINITI-2
P0031 JEEP
P0031 KIA
P0031 LEXUS
P0031 MAZDA
P0031 MITSUBISHI
P0031 NISSAN
P0031 NISSAN-2
P0031 SCION
P0031 SUBARU
P0031 SUZUKI
P0031 TOYOTA
P0031 VOLKSWAGEN
P0031 BUICK
P0031 CADILLAC
P0031 CHEVROLET
P0031 GMC
P0031 PONTIAC
P0031 SATURN
P0031 2002 NISSAN SENTRA
P0031 2003 NISSAN SENTRA
P0031 2004 NISSAN SENTRA
P0031 2006 NISSAN SENTRA
P0031 2005 NISSAN SENTRA
P0031 2001 TOYOTA COROLLA
P0031 2003 TOYOTA COROLLA
P0031 2002 TOYOTA COROLLA
P0031 2004 TOYOTA COROLLA
P0031 2005 TOYOTA COROLLA
P0031 2006 TOYOTA COROLLA
P0031 2003 INFINITI G35
P0031 2004 INFINITI G35
P0031 2006 INFINITI G35
P0031 2005 INFINITI G35
P0031 2005 SCION XB
P0031 2006 SCION XB
P0031 2007 SCION XB
P0031 2008 NISSAN MAXIMA
P0031 2007 NISSAN MAXIMA
P0031 2006 NISSAN MAXIMA
P0031 2008 NISSAN ALTIMA SEDAN
P0031 2009 NISSAN ALTIMA SEDAN
P0031 2010 NISSAN ALTIMA SEDAN
P0031 2011 NISSAN ALTIMA SEDAN
P0031 2012 NISSAN ALTIMA SEDAN
P0031 2001 TOYOTA HIGHLANDER
P0031 2004 TOYOTA HIGHLANDER
P0031 2002 TOYOTA HIGHLANDER
P0031 2003 TOYOTA HIGHLANDER
P0031 2005 TOYOTA HIGHLANDER
P0031 2006 TOYOTA HIGHLANDER
P0031 2007 TOYOTA HIGHLANDER
P0031 2002 TOYOTA HIGHLANDER
P0031 2003 TOYOTA HIGHLANDER
P0031 2004 TOYOTA HIGHLANDER
P0031 2005 TOYOTA HIGHLANDER
P0031 2006 TOYOTA HIGHLANDER
P0031 2007 TOYOTA HIGHLANDER
P0031 2004 TOYOTA PRIUS
P0031 2005 TOYOTA PRIUS
P0031 2006 TOYOTA PRIUS
P0031 2007 TOYOTA PRIUS
P0031 2008 TOYOTA PRIUS
P0031 2009 TOYOTA PRIUS
P0031 2008 NISSAN ROGUE
P0031 2009 NISSAN ROGUE
P0031 2010 NISSAN ROGUE
P0031 2011 NISSAN ROGUE
P0031 2012 NISSAN ROGUE
P0031 2013 NISSAN ROGUE
P0031 2007 NISSAN SENTRA
P0031 2008 NISSAN SENTRA
P0031 2009 NISSAN SENTRA
P0031 2010 NISSAN SENTRA
P0031 2011 NISSAN SENTRA
P0031 2012 NISSAN SENTRA
P0031 2006 TOYOTA CAMRY
P0031 2007 TOYOTA CAMRY
P0031 2008 TOYOTA CAMRY
P0031 2010 TOYOTA CAMRY
P0031 2011 TOYOTA CAMRY
P0031 2009 TOYOTA CAMRY
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