P1279 NISSAN SENTRA Possible Causes

• Faulty Air/Fuel Ratio (A/F) Sensor 1 Bank 1
• Air/Fuel Ratio (A/F) Sensor 1 Bank 1 Wiring Harness or Connectors Open or Short-Circuited
• 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 PCV
• Faulty Mass Air Flow Sensor

How is the P1279 NISSAN SENTRA Code Repaired?

Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

When is the Code Detected?

The response (from RICH to LEAN) of the A/F signal calculated by the ECM from the A/F Sensor 1 signal takes longer than the specified time.

Possible Symptoms

• Engine Light On (or Service Engine Soon Warning Light)
• Possible Rough Engine Idle

P1279 NISSAN SENTRA Meaning

The A/F sensor is a planar dual-cell limit current sensor. The sensor element of the A/F sensor combines a Nernst concentration cell (sensor cell) with an oxygen pump cell, which transports ions. It has a heating element within the element.
The sensor is capable of accurately measuring λ=1, but also in the lean and rich ranges. With its control electronics, the sensor emits a clear and continuous signal over a wide λ range (0.7 < λ < air).
The exhaust gas components diffuse through the diffusion gap at the oxygen pump electrode and the Nernst concentration cell, where they are brought to thermodynamic equilibrium.
An electronic circuit controls the pump current through the oxygen pump cell so that the composition of the exhaust gases in the diffusion gap remains constant at λ=1. Therefore, the A/F sensor is able to indicate the air/fuel ratio by this pumping current. Additionally, a heating element is integrated into the sensor to ensure the required operating temperature of 700 to 800°C (1,292 to 1,472°F).

P1279 ACURA Possible Causes

• Low engine oil pressure or level
• Open or short circuit condition
• Faulty VTEC oil pressure switch
• Faulty VTEC solenoid

How is ACURA P1279 Code Repair Performed?

Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

• Check Engine light on (or Service Engine Soon warning light)

P1279 ACURA Meaning

The VTEC system activates the VTEC solenoid valve through commands from the Powertrain Control Module (PCM) and charges/discharges the VTEC mechanism’s hydraulic circuit, which is installed in the valve system to switch valve timing between low and high. The PCM monitors the oil pressure conditions in the VTEC mechanism’s hydraulic circuit based on the VTEC oil pressure switch downstream of the VTEC solenoid valve. If there is a disparity between the oil pressure condition in the hydraulic circuit as determined by PCM command and the oil pressure condition as determined by the VTEC oil pressure switch status, the system is considered faulty and a DTC is recorded.

P1279 AUDI Possible Causes

• Faulty fuel metering solenoid
• Fuel metering solenoid harness is open or shorted
• Poor electrical connection in fuel metering solenoid circuit

How is P1279 AUDI Code Repaired?

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 pins.

Possible Symptoms

• Engine light on (or service engine soon warning light)

P1279 AUDI Meaning

Fuel Metering Solenoid Open/Short Circuit is the generic description for Audi P1279 code, but the manufacturer may have a different description for your vehicle model and year. Currently, we have no further information about the Audi P1279 OBDII code.

P1279 CHRYSLER Possible Causes

• Faulty starter relay
• Defective starter
• Starter wiring harness is open or short-circuited
• Poor electrical connection in the starter circuit

How is the P1279 CHRYSLER code repaired?

Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

When is the code detected?

The starter status is not equal to the desired status

Possible Symptoms

• Engine light on (or service engine soon warning light)

P1279 CHRYSLER Meaning

The Powertrain Control Module (PCM) monitors the starter. The PCM sets the OBDII code when the starter does not meet factory specifications.

P1279 DODGE Possible Causes

• Faulty starter relay
• Defective starter
• Starter wiring harness is open or short-circuited
• Poor electrical connection in the starter circuit

How is the P1279 DODGE code repaired?

Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

When is the code detected?

The starter status is not equal to the desired status

Possible Symptoms

• Engine light on (or service engine soon warning light)

P1279 DODGE Meaning

The Powertrain Control Module (PCM) monitors the starter. The PCM sets the OBDII code when the starter does not meet factory specifications.

P1279 HONDA Possible Causes

• Low engine oil pressure or level
• Open or short circuit condition
• Faulty VTEC oil pressure switch
• Faulty VTEC solenoid

How is the P1279 HONDA code repaired?

Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

• Check Engine light on (or Service Engine Soon warning light)

P1279 HONDA Meaning

The VTEC system activates the VTEC solenoid valve via command from the Powertrain Control Module (PCM) and charges/discharges the VTEC mechanism’s hydraulic circuit that is installed in the valve system to switch valve timing between low and high. The PCM monitors the oil pressure conditions in the VTEC mechanism’s hydraulic circuit based on the VTEC oil pressure switch downstream of the VTEC solenoid valve. If there is a disparity between the oil pressure condition in the hydraulic circuit that is determined by the PCM command and the oil pressure condition that is determined by the state of the VTEC oil pressure switch, the system is considered faulty and a DTC is stored.

P1279 INFINITI Possible Causes

• Faulty Air/Fuel Ratio (A/F) Sensor 1 Bank 1
• Air/Fuel Ratio (A/F) Sensor 1 Bank 1 Wiring Harness or Connectors 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 PCV
• Faulty Mass Air Flow Meter

How is P1279 INFINITI Code Repaired?

Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

When is the Code Detected?

The response (from RICH to LEAN) of the A/F signal calculated by the ECM from the A/F Sensor 1 signal takes longer than the specified time.

Possible Symptoms

• Engine Light On (or Service Engine Soon Warning Light)
• Possible Rough Engine Idle

P1279 INFINITI Meaning

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 heating element in the element.
The sensor is capable of accurately measuring λ=1, but also in the lean and rich ranges. With its control electronics, the sensor outputs a clear and continuous signal over a wide λ range (0.7 < λ < air).
The exhaust gas components diffuse through the diffusion gap at the oxygen pump electrode and the Nernst concentration cell, where they are brought to thermodynamic equilibrium.
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 the air/fuel ratio by this pumping current. Additionally, a heating element is built into the sensor to ensure the required operating temperature of 700 to 800°C (1,292 to 1,472°F).

P1279 LEXUS Possible Causes

• Faulty fuel injector
• Fuel injector harness is open or shorted
• Poor electrical connection in the fuel injector circuit

How is the P1279 LEXUS code repaired?

Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

• Engine light on (or service engine soon warning light)

P1279 LEXUS Meaning

Port injector circuit number 4 is the generic description for Lexus code P1279, but the manufacturer may have a different description for your vehicle model and year. Currently, we do not have further information on the Lexus P1279 OBDII code.

P1279 NISSAN Possible Causes

• Faulty Air/Fuel Ratio (A/F) Sensor 1 Bank 1
• Air/Fuel Ratio (A/F) Sensor 1 Bank 1 wiring harness or connectors 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 PCV
• Faulty mass air flow meter

How is P1279 NISSAN code repaired?

Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

When is the code detected?

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

Possible Symptoms

• Engine light on (or service engine soon warning light)
• Possible rough engine idle

P1279 NISSAN Meaning

The A/F sensor is a planar dual-cell limit current sensor. The sensing 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 heating element in the element.
The sensor is capable of accurately measuring λ=1, but also in the lean and rich ranges. With its control electronics, the sensor emits a clear and continuous signal over a wide λ range (0.7 < λ < air).
The exhaust gas components diffuse through the diffusion gap at the oxygen pump electrode and the Nernst concentration cell, where they are brought to thermodynamic equilibrium.
An electronic circuit controls the pump current through the oxygen pump cell so that the composition of the exhaust gases in the diffusion gap remains constant at =1. Therefore, the A/F sensor is able to indicate the air/fuel ratio by this pumping current. Additionally, a heating element is integrated into the sensor to ensure the required operating temperature of 700 to 800 C (1,292 to 1,472 F).

P1279 TOYOTA Possible Causes

• Faulty fuel injector
• Fuel injector harness is open or shorted
• Poor electrical connection in the fuel injector circuit

How is the repair of code P1279 TOYOTA performed?

Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

Possible Symptoms

• Engine light on (or service engine soon warning light)

P1279 TOYOTA Meaning

The port injector circuit number 4 is the generic description for Toyota code P1279, but the manufacturer may have a different description for your vehicle model and year. Currently, we do not have additional information about the Toyota P1279 OBDII code.