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Engine-Codes – GMC – P1275 GMC

P1275 GMC Code - Accelerator Pedal Position Sensor 1 Circuit

Quick Answer

The P1275 GMC diagnostic trouble code refers to an issue with the Accelerator Pedal Position Sensor 1 Circuit. Common causes include Faulty accelerator pedal position sensor: The sensor itself may be malfunctioning, providing incorrect signals to the ECM, Wiring harness issues: The sensor's wiring harness may be damaged or have poor connections, leading to intermittent signal loss, Connector problems: The sensor's electrical connector may be loose or corroded, affecting the signal transmission. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1275 GMC indicates Accelerator Pedal Position Sensor 1 Circuit.
Common causes
Common causes include Faulty accelerator pedal position sensor: The sensor itself may be malfunctioning, providing incorrect signals to the ECM, Wiring harness issues: The sensor's wiring harness may be damaged or have poor connections, leading to intermittent signal loss, Connector problems: The sensor's electrical connector may be loose or corroded, affecting the signal transmission.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code P1275 GMC Description

The P1275 GMC diagnostic trouble code refers to an issue with the Accelerator Pedal Position Sensor 1 Circuit. This sensor is a crucial component in modern vehicles as it helps control the throttle input based on how much the driver presses on the accelerator pedal. The sensor provides feedback to the engine control module (ECM) to adjust fuel delivery and airflow to the engine, ultimately affecting the vehicle's performance and efficiency.

OBDII Code P1275 GMC - Accelerator Pedal Position Sensor 1 Circuit
P1275 GMC Code - Accelerator Pedal Position Sensor 1 Circuit

Common Causes of P1275 GMC

  1. Faulty accelerator pedal position sensor: The sensor itself may be malfunctioning, providing incorrect signals to the ECM.
  2. Wiring harness issues: The sensor's wiring harness may be damaged or have poor connections, leading to intermittent signal loss.
  3. Connector problems: The sensor's electrical connector may be loose or corroded, affecting the signal transmission.
  4. ECM software issues: There may be a software glitch in the engine control module that is causing incorrect readings from the sensor.

Symptoms of P1275 GMC

  1. Erratic throttle response: The vehicle may exhibit sudden surges or delays in throttle input, making it difficult to maintain a steady speed.
  2. Poor acceleration: The engine may struggle to accelerate smoothly, especially when pressing on the accelerator pedal.
  3. Engine stalling: The vehicle may stall unexpectedly, especially when coming to a stop or accelerating from a standstill.
  4. Reduced power output: The engine may lack power and struggle to reach higher speeds, especially during acceleration.

How to Fix P1275 GMC

  1. Diagnose the code: Use a diagnostic scan tool to retrieve the P1275 code and perform a thorough inspection of the accelerator pedal position sensor and its circuitry.
  2. Check wiring and connectors: Inspect the sensor's wiring harness and connector for any damage, corrosion, or loose connections. Repair or replace as necessary.
  3. Test sensor functionality: Test the sensor's output voltage using a multimeter to ensure it is within specifications. Replace the sensor if it fails the test.
  4. Clear the code: Once the repair is completed, clear the P1275 code from the ECM's memory using a scan tool.
  5. Test drive the vehicle: Take the vehicle for a test drive to ensure the accelerator pedal position sensor is functioning correctly and the symptoms associated with the code have been resolved.

Cost to Fix P1275 GMC

The typical repair costs for addressing the P1275 GMC code can vary depending on the specific cause of the issue. In general, replacing the accelerator pedal position sensor can range from $100 to $300, including parts and labor. However, if the issue is related to wiring harness or connector problems, additional costs may apply for repairs or replacements.

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

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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