P1276 – Air-Fuel Ratio Sensor 1 Bank 1 High Voltage Circuit Detected

P1276 Possible Causes

  • Faulty air/fuel ratio (A/F) sensor 1, bank 1
  • Air-fuel ratio (A/F) harness is open or shorted
  • Poor electrical connection in the air-fuel ratio (A/F) circuit

How is code P1276 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)

P1276 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 contains a heating element within the component.
The sensor can accurately measure λ=1, as well as in both lean and rich ranges. With its control electronics, the sensor provides a clear and 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 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 λ=1. Therefore, the A/F sensor can indicate the air/fuel ratio through this pumping current. Additionally, a heating element is integrated into the sensor to maintain the required operating temperature of 700 to 800°C (1,292 to 1,472°F).

P1276 NISSAN SENTRA – Air-Fuel Ratio Sensor 1 Circuit High Voltage Detected in Bank 1

P1276 NISSAN SENTRA Possible Causes

  • Faulty air/fuel ratio (A/F) sensor 1, bank 1
  • Air-fuel ratio (A/F) harness is open or shorted
  • Poor electrical connection in the air-fuel ratio (A/F) circuit

How is the P1276 NISSAN SENTRA 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 A/F signal calculated by the ECM from the A/F sensor 1 signal is constantly around 0V.

Possible Symptoms

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

P1276 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 range. 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).

P1276 BUICK – Accelerator Pedal Position Sensor 1 Performance

P1276 BUICK Possible Causes

  • Faulty accelerator pedal position (APP) sensor
  • Accelerator pedal position harness is open or shorted
  • Poor electrical connection in the accelerator pedal position circuit

How is the P1276 BUICK 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)

P1276 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.

P1276 CADILLAC – Accelerator Pedal Position Sensor 1 Performance

P1276 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 P1276 CADILLAC 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 below 0.2 volts or above 4.25 volts on the APP signal

Possible Symptoms

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

P1276 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.

P1276 CHEVROLET – Accelerator Pedal Position Sensor 1 Performance

P1276 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 P1276 CHEVROLET 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)

P1276 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.

P1276 FORD – Cylinder #6 High to Low Side Open

P1276 FORD Possible Causes

  • Faulty fuel injector
  • Faulty Injector Driver Module (IDM)
  • Fuel injector harness is open or shorted
  • Poor electrical connection in the fuel injector circuit

How is the P1276 FORD 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)

P1276 FORD Meaning

The Injector Driver Module (IDM) is capable of detecting individual injector opens and shorts to ground or power while the engine is running. The Injector Driver Module is also capable of detecting opens or shorts to ground in the right or left bank high side circuit. The Diagnostic Trouble Code (DTC) indicates a low to high side open in the circuit between the Injector Driver Module and the injector.

P1276 GMC – Accelerator Pedal Position Sensor 1 Performance

P1276 GMC 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 GMC Code P1276 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)

P1276 GMC 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.

P1276 INFINITI – Air Fuel Ratio Sensor 1 Bank 1 High Voltage Circuit Detected

P1276 INFINITI Possible Causes

  • Faulty air/fuel ratio (A/F) sensor 1, bank 1
  • Air-fuel ratio (A/F) harness is open or shorted
  • Poor electrical connection in the air-fuel ratio (A/F) circuit

How is P1276 INFINITI 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 A/F signal calculated by the ECM from the A/F sensor 1 signal is constantly around 0V.

Possible Symptoms

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

P1276 INFINITI 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 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 =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).

P1276 LEXUS – Port Injector Circuit Number 1

P1276 LEXUS Possible Causes

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

How is the P1276 LEXUS 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.

Possible Symptoms

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

P1276 LEXUS Meaning

Port 1 injector circuit number is the generic description for Lexus P1276 code, but the manufacturer may have a different description for your vehicle model and year. Currently, we have no further information about the Lexus P1276 OBDII code.

P1276 MAZDA – Cylinder #6 High to Low Side Open

P1276 MAZDA Possible Causes

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

How is P1276 MAZDA code repair done?

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)

P1276 MAZDA Meaning

A fault is detected by the fuel injector interface module in the secondary (rear) fuel injector circuit