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P0264 2016 GMC Sierra Code - Cylinder 2 Injector Control Circuit Low Voltage

Quick Answer

The P0264 diagnostic trouble code (DTC) indicates that the Engine Control Module (ECM) has detected a low voltage condition in the injector control circuit for cylinder 2. Common causes include Faulty Fuel Injector: A malfunctioning injector may not operate correctly, leading to low voltage readings, Wiring Issues: Damaged, frayed, or corroded wiring in the injector control circuit can result in insufficient voltage, Poor Electrical Connections: Loose or corroded connectors can impede the flow of electricity to the injector. 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
P0264 2016 GMC Sierra indicates Cylinder 2 Injector Control Circuit Low Voltage.
Common causes
Common causes include Faulty Fuel Injector: A malfunctioning injector may not operate correctly, leading to low voltage readings, Wiring Issues: Damaged, frayed, or corroded wiring in the injector control circuit can result in insufficient voltage, Poor Electrical Connections: Loose or corroded connectors can impede the flow of electricity to the injector.
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 Oct 02, 2024
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Code P0264 2016 GMC Sierra Description

The P0264 diagnostic trouble code (DTC) indicates that the Engine Control Module (ECM) has detected a low voltage condition in the injector control circuit for cylinder 2. This code is part of the fuel injection system diagnostics and is crucial for maintaining optimal engine performance. The injector control circuit is responsible for delivering the appropriate voltage to the fuel injector, which in turn controls the amount of fuel injected into the combustion chamber.

OBDII Code P0264 2016 GMC Sierra - Cylinder 2 Injector Control Circuit Low Voltage
P0264 2016 GMC Sierra Code - Cylinder 2 Injector Control Circuit Low Voltage

Common Causes of P0264 2016 GMC Sierra

  1. Faulty Fuel Injector: A malfunctioning injector may not operate correctly, leading to low voltage readings.
  2. Wiring Issues: Damaged, frayed, or corroded wiring in the injector control circuit can result in insufficient voltage.
  3. Poor Electrical Connections: Loose or corroded connectors can impede the flow of electricity to the injector.
  4. Faulty ECM: A malfunctioning engine control module may incorrectly interpret voltage levels or fail to send the proper signals.
  5. Fuel Pump Problems: An issue with the fuel pump or its relay can affect the voltage supplied to the injector circuit.

Symptoms of P0264 2016 GMC Sierra

  1. Rough Idling: The engine may run unevenly, leading to vibrations and a noticeable lack of smoothness.
  2. Engine Misfires: You may experience a loss of power or hesitation during acceleration, particularly under load.
  3. Increased Fuel Consumption: A lean condition can lead to inefficient fuel usage, resulting in higher fuel costs.
  4. Check Engine Light: The illumination of the check engine light on the dashboard is a common symptom when a DTC is triggered.
  5. Stalling: The vehicle may unexpectedly stall, especially at low speeds or when coming to a stop.

How to Fix P0264 2016 GMC Sierra

  1. Visual Inspection: Begin with a thorough visual inspection of the wiring and connectors associated with the cylinder 2 injector. Look for signs of damage, corrosion, or loose connections.
  2. Test Voltage Supply: Use a multimeter to check the voltage at the injector connector. Ensure that the voltage meets the specifications outlined in the vehicle's service manual.
  3. Inspect the Fuel Injector: Remove and test the fuel injector for proper operation. If it is faulty, replace it with a new one.
  4. Repair Wiring/Connections: If any wiring issues or poor connections are identified, repair or replace the affected components to ensure a reliable electrical connection.
  5. ECM Testing: If all other components are functioning correctly, consider testing the ECM for faults. Reprogramming or replacing the ECM may be necessary if it is determined to be faulty.

Cost to Fix P0264 2016 GMC Sierra

The cost of repairing a P0264 code can vary significantly based on the specific diagnosis and repairs needed. On average, you can expect to pay between $200 and $600 for repairs. This estimate includes parts such as a new fuel injector (which can range from $50 to $150) and labor costs, which typically range from $80 to $150 per hour.

What does this mean?

Tech Notes for P0264 2016 GMC Sierra

A clogged or partially clogged fuel injector can cause this code. Start by performing an injector flush before replacing the injector.

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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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