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

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

Possible Symptoms

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

P1276 NISSAN 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).

P1276 TOYOTA – Port Injector Circuit Number 1

P1276 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 P1276 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)

P1276 TOYOTA Meaning

Port 1 injector circuit number is the generic description for Toyota code P1276, but the manufacturer may have a different description for your vehicle model and year. Currently, we do not have more information about the Toyota P1276 OBDII code.

P1277 – Cylinder #7 High to Low Side Open

P1277 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 P1277 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

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

P1277 Meaning

The injector control module (IDM) is capable of detecting individual injector open circuits and short circuits to ground or power while the engine is running. The injector control module is also capable of detecting open circuits or short circuits to ground in the left or right bank high side circuit. The diagnostic trouble code (DTC) indicates an open circuit from low to high side in the circuit between the injector control module and the injector.

P1277 BUICK – Accelerator Pedal Position Sensor 1 Low Voltage Circuit

P1277 BUICK 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 P1277 BUICK 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)

P1277 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.

P1277 CADILLAC – Accelerator Pedal Position Sensor 1 Low Voltage Circuit

P1277 CADILLAC 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 P1277 CADILLAC code repair 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.

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)

P1277 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.

P1277 CHEVROLET – Accelerator Pedal Position Sensor 1 Low Voltage Circuit

P1277 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 P1277 CHEVROLET 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)

P1277 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.

P1277 CHRYSLER – Low Starter Control Circuit 2

P1277 CHRYSLER Possible Causes

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

How is the P1277 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)

P1277 CHRYSLER Meaning

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

P1277 DODGE – Low Starter Control Circuit 2

P1277 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 P1277 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)

P1277 DODGE Meaning

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

P1277 FORD – Cylinder #7 High to Low Side Open

P1277 FORD Possible Causes

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

How is P1277 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.

Technical Notes

First check the valve cover wiring harness connections, including under the valve cover.

Possible Symptoms

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

P1277 FORD Meaning

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

P1277 GMC – Accelerator Pedal Position Sensor 1 Low Voltage Circuit

P1277 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 the P1277 GMC 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)

P1277 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.