P0051 2012 Nissan Pathfinder Code - Air Fuel Ratio Sensor 1 Heater Bank 2 Control Circuit Low
Quick Answer
Air-Fuel Ratio (A/F) sensor need to reach a minimum operating temperature of 1200 degrees F to produce an accurate voltage signal. Common causes include 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. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P0051 2012 Nissan Pathfinder indicates Air Fuel Ratio Sensor 1 Heater Bank 2 Control Circuit Low.
- Common causes
- Common causes include 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.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code P0051 2012 Nissan Pathfinder Description
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.
What are the Possible Causes of the DTC P0051 2012 Nissan Pathfinder?
- 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 to Fix the DTC P0051 2012 Nissan Pathfinder?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0051 2012 Nissan Pathfinder code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P0051 2012 Nissan Pathfinder code?
Need more information on how to fix the P0051 2012 Nissan Pathfinder code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0051 2012 Nissan Pathfinder code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0051 2012 Nissan Pathfinder Code
1. What are the common symptoms of OBDII code P0051 in a 2012 Nissan Pathfinder?
- Common symptoms include poor fuel economy, rough idling, engine misfires, and the illumination of the check engine light.
2. What does the OBDII code P0051 for Air Fuel Ratio Sensor 1 Heater Bank 2 Control Circuit Low indicate?
- This code indicates a malfunction in the control circuit of the heater for the air fuel ratio sensor located in bank 2 of the vehicle.
3. What are the possible causes of OBDII code P0051 in a 2012 Nissan Pathfinder?
- Possible causes include a faulty air fuel ratio sensor, damaged wiring or connectors in the heater circuit, a blown fuse, or a problem with the engine control module (ECM).
4. How can I diagnose the issue causing OBDII code P0051 in my 2012 Nissan Pathfinder?
- Diagnosis involves checking the air fuel ratio sensor and its heater circuit for continuity, inspecting wiring and connectors for damage, testing the heater relay, and verifying ECM functionality.
5. Can I continue to drive my 2012 Nissan Pathfinder with OBDII code P0051 present?
- It is not recommended to continue driving with this code present, as it can lead to decreased fuel efficiency and potential engine performance issues.
6. How can I repair OBDII code P0051 in my 2012 Nissan Pathfinder?
- Repair typically involves replacing the air fuel ratio sensor in bank 2, repairing any damaged wiring or connectors, checking and replacing fuses if necessary, and resetting the fault code.
7. Is it possible to reset the OBDII code P0051 in a 2012 Nissan Pathfinder without repairing the issue?
- While you can clear the code temporarily, it is not advised to do so without addressing the underlying problem, as it may lead to further complications and potential damage to the vehicle.
8. Are there any preventive maintenance tips to avoid OBDII code P0051 in a 2012 Nissan Pathfinder?
- Regularly inspecting and maintaining the air fuel ratio sensors, wiring, and connectors can help prevent issues that may trigger this code.
9. How long does it typically take to repair OBDII code P0051 in a 2012 Nissan Pathfinder?
- The repair time can vary depending on the exact cause of the code and the availability of parts, but it usually takes a few hours to complete the repair.
10. Can a DIY enthusiast without professional experience fix OBDII code P0051 in a 2012 Nissan Pathfinder?
- While some DIY enthusiasts may have the skills to address this issue, it is recommended to consult a professional mechanic for proper diagnosis and repair to ensure the problem is fully resolved.
Discuss the causes and fixes for P0051 2012 Nissan Pathfinder OBDII Code
Code P0051 2012 Nissan Pathfinder comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
