Engine-Codes - Nissan - P1051 NISSAN

P1051 NISSAN - Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 2

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

P1051 NISSAN Possible Causes

  • Faulty Air Fuel Ratio Sensor 1 Bank 2
  • Air Fuel Ratio Sensor 1 Bank 2 harness is open or shorted
  • Air Fuel Ratio Sensor 1 Bank 2 circuit poor electrical connection

How is the P1051 NISSAN 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.

Tech Notes

There are Factory Service Bulletins for the following models:

2005 Nissan Altima
2006 Nissan Altima
2005-2006 Nissan Altima Factory Service Bulletin P1051 OBDII Code

2004 Nissan Maxima w/ 5 Speed Automatic Transmission
2004 Nissan Quest w/ 5 Speed Automatic Transmission
2004 Nissan Maxima, Quest Factory Service Bulletin P1051 OBDII Code

2004 Nissan Maxima w/ Manual Transmission or 4 Speed Automatic Transmission
2004 Nissan Quest w/ 4 Speed Automatic Transmission
2004 Nissan Maxima, Quest Factory Service Bulletin P1051 OBDII Code

2004 Nissan Armada
2004 Nissan Titan
2004 Nissan Armada/Titan Factory Service Bulletin OBDII Code P1051

What is the cost to diagnose the P1051 NISSAN code

Labor: 1.0

The cost to diagnose the P1051 NISSAN code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
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Possible Symptoms

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

P1051 NISSAN Meaning

The Engine Control Module (ECM) performs ON/OFF duty control of the Air Fuel Ratio (A/F) Sensor 1 heater corresponding to the engine operating condition to keep the temperature of A/F Sensor 1 element at the specified range. The Diagnostic Trouble Code (DTC) will set when the current amperage in the heated Air Fuel Ratio (A/F) Sensor 1 heater circuit is out of the normal range. An excessively low voltage signal is sent to the Engine Control Module (ECM) through the heated Air Fuel Ratio (A/F) Sensor 1 heater.

More Information

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Information for specific Nissan models

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