P0031 2002 NISSAN SENTRA - HO2S11 Heater Control Circuit Low
P0031 2002 NISSAN SENTRA 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)
How do I fix code P0031 2002 NISSAN SENTRA?Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
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There is a Factory Service Bulletin for the 2002 Nissan Sentra:
2002 Nissan Sentra Factory Service Bulletin OBDII Code P0131
Cost of diagnosing the P0031 2002 NISSAN SENTRA code
Labor: 1.0The cost of diagnosing the P0031 2002 NISSAN SENTRA code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
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)
P0031 2002 NISSAN SENTRA DescriptionOxygen 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.
More InformationNeed more information on how to fix the P0031 2002 NISSAN SENTRA code?
Get Access to Factory Service Manuals
Need more help?Get the P0031 2002 Nissan Sentra code diagnosed by a professional: Find a repair shop in your area
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