AutoCodes - Nissan - P1279 2004 NISSAN SENTRA

P1279 2004 NISSAN SENTRA Code - Air Fuel Ratio Sensor 1 Bank 1 Circuit Slow Response

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3
Table of contents

|P1279 2004 NISSAN SENTRA code possible causes

  • Faulty Air fuel ratio (A/F) Sensor 1 Bank 1
  • Air fuel ratio (A/F) Sensor 1 Bank 1 Harness or connectors is open or shorted
  • Air fuel ratio (A/F) Sensor 1 Bank 1 circuit poor electrical connection
  • Fuel pressure
  • Faulty Fuel injector
  • Intake air leaks
  • Exhaust Gas leaks
  • Faulty PVC
  • Faulty Air Flow Meter

|How do I fix the P1279 2004 NISSAN SENTRA code?

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.

|P1279 2004 NISSAN SENTRA code tech notes





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|Cost of diagnosing the P1279 2004 NISSAN SENTRA code

Labor: 1.0

The cost of diagnosing the P1279 2004 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 P1279 2004 NISSAN SENTRA code detected?

The response (from RICH to LEAN) of the A/F signal computed by ECM from A/F sensor 1 signal takes more than the specified time.

|What are P1279 2004 NISSAN SENTRA code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Possible rough engine idle

|P1279 2004 NISSAN SENTRA code description

The A/F sensor is a planar dual-cell limit current sensor. The sensor element of the A/F sensor is the combination of a Nernst concentration cell (sensor cell) with an oxygen-pump cell, which transports ions. It has a heater in the element.
The sensor is capable of precise measurement λ= 1, but also in the lean and rich range. Together with its control electronics, the sensor outputs a clear, continuous signal throughout a wide λ range (0.7 < λ < air).
The exhaust gas components diffuse through the diffusion gap at the electrode of the oxygen pump and Nernst concentration cell, where they are brought to thermodynamic balance.
An electronic circuit controls the pump current through the oxygen-pump cell so that the composition of the exhaust gas in the diffusion gap remains constant at λ = 1. Therefore, the A/F sensor is able to indicate air/fuel ratio by this pumping of current. In addition, a heater is integrated in the sensor to ensure the required operating temperature of 700 - 800 C (1,292 - 1,472 F).
OBDII Code P1279 2004 Nissan Sentra - Air Fuel Ratio Sensor 1 Bank 1 Circuit Slow Response - AutoCodes.com

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|P1279 2004 NISSAN SENTRA code comments

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Repair Importance Level: 3
 
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