P1277 INFINITI – Bank 1 Sensor 1 Air-Fuel Ratio Sensor Slow Response

P1277 INFINITI Possible Causes

  • Faulty Air/Fuel Ratio (A/F) Sensor 1, Bank 1
  • Air/Fuel Ratio (A/F) Sensor 1 Bank 1 harness is open or shorted
  • Air/Fuel Ratio (A/F) Sensor 1 Bank 1 circuit poor electrical connection

How is P1277 INFINITI 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)

P1277 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 heater element inside.
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, 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 a 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 =1. Therefore, the A/F sensor is able to indicate the air/fuel ratio by this pump current. Additionally, a heater element is integrated into the sensor to ensure the required operating temperature of 700 to 800°C (1,292 to 1,472°F).

P1277 LEXUS – Port Injector Circuit Number 2

P1277 LEXUS Possible Causes

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

How is the repair of code P1277 LEXUS performed?

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)
 

P1277 LEXUS Meaning

Port 2 injector circuit number is the generic description for Lexus code P1277, but the manufacturer may have a different description for your vehicle model and year. Currently, we have no further information about the Lexus P1277 OBDII code.

P1277 NISSAN – Air Fuel Ratio Sensor 1 Bank 1 Circuit Slow Response

P1277 NISSAN Possible Causes

  • Faulty Air Fuel Ratio (A/F) Sensor 1, Bank 1
  • Air Fuel Ratio (A/F) Sensor 1 Bank 1 harness is open or shorted
  • Air Fuel Ratio (A/F) Sensor 1 Bank 1 circuit poor electrical connection

How is P1277 NISSAN 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)

P1277 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 outputs a clear, 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 exhaust gas composition in the diffusion gap remains constant at =1. Therefore, the A/F sensor is capable of indicating 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).

P1277 TOYOTA – Port Injector Circuit Number 2

P1277 TOYOTA Possible Causes

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

How is the repair of code P1277 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)

P1277 TOYOTA Meaning

Port 2 injector circuit number is the generic description for Toyota code P1277, but the manufacturer may have a different description for your vehicle model and year. Currently, we have no further information about the Toyota P1277 OBDII code.

P1278 – Air-Fuel Ratio Sensor 1 Bank 1 Circuit Slow Response

P1278 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 are 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 meter

How is code P1278 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)

P1278 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 can accurately measure at λ=1, but also in both lean and rich ranges. With its control electronics, the sensor outputs a clear, continuous signal across a wide λ range (0.7 < λ < air).
Exhaust gas components diffuse through the diffusion gap at the oxygen pump electrode and 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 exhaust gas composition in the diffusion gap remains constant at λ=1. Therefore, the A/F sensor can indicate the air/fuel ratio via this pump 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).

P1278 NISSAN SENTRA – Air-Fuel Ratio Sensor 1 Bank 1 Circuit Slow Response

P1278 2002 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 Meter

How is the P1278 2002 NISSAN SENTRA Code Repaired?

Start by checking the “Possible Causes” listed above. Visually inspect the associated wiring harness and 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

P1278 2002 NISSAN SENTRA 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 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).

P1278 AUDI – Fuel Metering Solenoid Short to Positive

P1278 AUDI Possible Causes

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

How is code P1278 AUDI 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)
 

P1278 AUDI Meaning

Fuel metering solenoid short to positive is the generic description for Audi P1278 code, but the manufacturer may have a different description for your vehicle model and year. Currently, we have no further information about the Audi P1278 OBDII code.

P1278 BUICK – Accelerator Pedal Position Sensor 1 Circuit High Voltage

  • Faulty Accelerator Pedal Position (APP)
  • Accelerator Pedal Position harness is open or shorted
  • Poor electrical connection in the Accelerator Pedal Position circuit
 

How is the P1278 BUICK 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.

 
 

When is the code detected?

The Engine Control Module (ECM) detected a voltage lower than 0.2 volts or higher than 4.25 volts on the APP signal

Possible Symptoms

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

P1278 BUICK Meaning

The Accelerator Pedal Position (APP) sensors are located in the Throttle Actuator Control (TAC) module assembly. The TAC module assembly is mounted on the accelerator pedal bracket. There are 3 individual APP sensors in the TAC module. Three separate signal circuits, low reference circuits, and 5-volt reference circuits are used to determine the accelerator pedal position. The APP sensor signal voltages increase when the accelerator pedal is pressed.

P1278 CADILLAC – Accelerator Pedal Position Sensor 1 High Voltage Circuit

P1278 CADILLAC Possible Causes

  • Faulty Accelerator Pedal Position (APP)
  • Accelerator Pedal Position Harness is Open or Shorted
  • Poor Electrical Connection in the Accelerator Pedal Position Circuit

How is the P1278 CADILLAC 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 Engine Control Module (ECM) detected a voltage below 0.2 volts or above 4.25 volts on the APP signal

Possible Symptoms

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

P1278 CADILLAC Meaning

The Accelerator Pedal Position (APP) sensors are located in the Throttle Actuator Control (TAC) module assembly. The TAC module assembly is mounted on the accelerator pedal bracket. There are 3 individual APP sensors in the TAC module. Three separate signal circuits, low reference circuits, and 5-volt reference circuits are used to determine the accelerator pedal position. The APP sensor signal voltages increase when the accelerator pedal is pressed.

P1278 CHEVROLE T – High Voltage Circuit 1 Accelerator Pedal Position Sensor

P1278 CHEVROLET Possible Causes

  • Faulty Accelerator Pedal Position (APP)
  • Accelerator Pedal Position Harness is Open or Shorted
  • Poor Electrical Connection in the Accelerator Pedal Position Circuit

How is the P1278 CHEVROLET 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 Engine Control Module (ECM) detected a voltage below 0.2 volts or above 4.25 volts on the APP signal

Possible Symptoms

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

P1278 CHEVROLET Meaning

The Accelerator Pedal Position (APP) sensors are located in the Throttle Actuator Control (TAC) module assembly. The TAC module assembly is mounted on the accelerator pedal bracket. There are 3 individual APP sensors in the TAC module. Three separate signal circuits, low reference circuits, and 5-volt reference circuits are used to determine the accelerator pedal position. The APP sensor signal voltages increase when the accelerator pedal is pressed.