P0031 - HO2S Heater Control Circuit Low Bank 1 Sensor 1
- 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)
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
- Engine Light ON (or Service Engine Soon Warning Light)
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.
P0031 For specific makes
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
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