P0051 2009 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 2009 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 2009 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 2009 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 2009 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 2009 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.
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Frequently Asked Questions about P0051 2009 Nissan Pathfinder Code
1. What are the common symptoms of OBDII code P0051 on a 2009 Nissan Pathfinder?
- Common symptoms include poor fuel economy, rough idling, hesitation during acceleration, and the illumination of the check engine light.
2. What does the OBDII code P0051 on a 2009 Nissan Pathfinder indicate?
- The code P0051 indicates an issue with the Air Fuel Ratio Sensor 1 Heater Bank 2 Control Circuit being too low.
3. What are the possible causes of OBDII code P0051 on a 2009 Nissan Pathfinder?
- Possible causes include a faulty air fuel ratio sensor, a damaged wiring harness, a blown fuse, or a problem with the engine control module.
4. How can I diagnose the cause of OBDII code P0051 on a 2009 Nissan Pathfinder?
- Diagnosis involves checking the air fuel ratio sensor for proper operation, inspecting the wiring for any damage, testing the heater circuit, and scanning for any related codes.
5. Can I drive my 2009 Nissan Pathfinder with OBDII code P0051?
- It is not recommended to drive with the code P0051 as it can lead to reduced fuel efficiency and potential engine performance issues.
6. How can I repair OBDII code P0051 on a 2009 Nissan Pathfinder?
- Repair options include replacing the Air Fuel Ratio Sensor 1, repairing any damaged wiring, checking and replacing the fuse if necessary, and clearing the code.
7. How much does it cost to fix OBDII code P0051 on a 2009 Nissan Pathfinder?
- The cost of repair can vary depending on the exact cause of the issue, but it may range from $200 to $500 including parts and labor.
8. Can I reset the OBDII code P0051 on a 2009 Nissan Pathfinder without fixing the issue?
- While you can clear the code using an OBDII scanner, it is not recommended as the underlying issue could lead to further problems if left unresolved.
9. How long does it take to repair OBDII code P0051 on a 2009 Nissan Pathfinder?
- The repair time can vary depending on the extent of the issue, but it typically takes 1-2 hours to diagnose and fix the problem.
10. Will OBDII code P0051 cause my 2009 Nissan Pathfinder to fail an emissions test?
- Yes, having the code P0051 present can cause your vehicle to fail an emissions test, as it indicates a problem with the air fuel ratio sensor heater circuit.
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