Engine-Codes - Nissan - P0051 2009 NISSAN SENTRA

P0051 2009 NISSAN SENTRA Code - Air Fuel Ratio Sensor 1 Heater Bank 2 Control Circuit Low

Repair Importance Level: 2/3
Repair Difficulty Level: 2/3  What is this?
Table of contents

|P0051 2009 NISSAN SENTRA code possible causes

  • Faulty Air-Fuel Ratio (A/F) Sensor Bank 2 Sensor 1
  • Air-Fuel Ratio (A/F) Sensor Bank 2 Sensor 1 harness is open shorted to ground
  • Air-Fuel Ratio (A/F) Sensor Bank 2 Sensor 1 circuit poor electrical connection
  • Air-Fuel Ratio (A/F) Sensor Bank 2 Sensor 1 circuit fuse
  • Faulty Engine Control Module (ECM)

|How is the P0051 2009 NISSAN SENTRA code repair?

Start by checking 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.

|P0051 2009 NISSAN SENTRA code tech notes

See more pictures on link below

2007-2012 Nissan Sentra Air/Fuel Ratio - Oxygen Sensor Location

|What is the cost to diagnose the P0051 2009 NISSAN SENTRA code

Labor: 1.0

The cost to diagnose the P0051 2009 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 P0051 2009 NISSAN SENTRA code detected?

The P0051 is set when the ECM detects an excessively low voltage through the heated oxygen sensor heater circuit

|What are P0051 2009 NISSAN SENTRA code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|What is P0051 2009 NISSAN SENTRA code meaning?

Air-Fuel Ratio (A/F) sensor need to reach a minimum operating temperature of 1200 degrees F to produce an accurate voltage signal. The faster the air-fuel ratio 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 air-fuel ratio sensor. The ECM controls the air-fuel ratio 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.

|Need more information with the P0051 2009 NISSAN SENTRA code?

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|Need help with a P0051 2009 NISSAN SENTRA code?

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