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Engine-Codes – GMC – P1244 GMC

P1244 GMC Code - Injector 8 Output Circuit

Quick Answer

The P1244 GMC code indicates an issue with the injector 8 output circuit in the vehicle's engine control module (ECM). Common causes include Faulty fuel injector: A malfunctioning fuel injector can cause the injector 8 output circuit to fail, Wiring issues: Damaged or corroded wiring connections to the fuel injector can disrupt the circuit, ECM failure: A malfunction in the engine control module can also trigger this code. 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
P1244 GMC indicates Injector 8 Output Circuit.
Common causes
Common causes include Faulty fuel injector: A malfunctioning fuel injector can cause the injector 8 output circuit to fail, Wiring issues: Damaged or corroded wiring connections to the fuel injector can disrupt the circuit, ECM failure: A malfunction in the engine control module can also trigger this code.
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 10, 2024
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Code P1244 GMC Description

The P1244 GMC code indicates an issue with the injector 8 output circuit in the vehicle's engine control module (ECM). The injector is responsible for delivering fuel into the combustion chamber at the precise moment for efficient engine operation. When this code is triggered, it means that the ECM has detected a problem with the circuit responsible for controlling the fuel injector on cylinder 8. This can lead to a variety of performance issues and potentially cause long-term damage if not addressed promptly.

OBDII Code P1244 GMC - Injector 8 Output Circuit
P1244 GMC Code - Injector 8 Output Circuit

Common Causes of P1244 GMC

  1. Faulty fuel injector: A malfunctioning fuel injector can cause the injector 8 output circuit to fail.
  2. Wiring issues: Damaged or corroded wiring connections to the fuel injector can disrupt the circuit.
  3. ECM failure: A malfunction in the engine control module can also trigger this code.
  4. Poor electrical connection: Loose or poor electrical connections can result in a weak signal to the fuel injector.
  5. Fuel system problems: Issues with the fuel system, such as low fuel pressure or clogged fuel injectors, can impact injector performance.

Symptoms of P1244 GMC

  1. Rough idling: The engine may run unevenly or jerk when idling.
  2. Decreased fuel efficiency: The vehicle may experience a drop in fuel efficiency.
  3. Engine misfires: The engine may misfire, causing a noticeable loss of power.
  4. Hesitation or stalling: The vehicle may hesitate or stall during acceleration.
  5. Check Engine Light: The Check Engine Light may illuminate on the dashboard.

How to Fix P1244 GMC

  1. Diagnose the issue: Use a scan tool to retrieve the specific diagnostic trouble code and pinpoint the problem.
  2. Inspect wiring and connections: Check for any damage or corrosion in the wiring harness and ensure all connections are secure.
  3. Test the fuel injector: Test the fuel injector on cylinder 8 to determine if it is functioning properly.
  4. Replace faulty components: Replace any faulty fuel injector, wiring, or ECM as needed to resolve the issue.
  5. Clear the code: After completing the repair, clear the diagnostic trouble code from the ECM to reset the system.

Cost to Fix P1244 GMC

The cost of repairing the injector 8 output circuit can vary depending on the specific cause of the issue and the make and model of the vehicle. On average, the repair costs for this type of issue could range from $200 to $800, including parts and labor. However, it's important to note that labor rates at auto repair shops can vary significantly, with hourly rates typically ranging from $80 to $150. Additionally, the cost of parts such as a fuel injector or engine control module can also affect the overall repair expenses. It's recommended to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate based on your vehicle's specific needs.

What does this mean?

Tech Notes for P1244 GMC

If only 1 fuel injector Control circuit Diagnostic Trouble Code (DTC) is set, an open circuit or poor connection is the most likely cause. If groups of 4 fuel injector Control circuit DTCs are set, suspect a short to ground. Cylinder groups are 2, 3, 5, 8 or 1, 4, 6, 7. More than 4 fuel injector Control circuit DTCs set indicate short to voltage on fuel injector Control circuit is the most likely cause.



There is a factory service bulletin for the following models:



2004 GMC Sierra

2005 GMC Sierra

2004 GMC Topkick

2005 GMC Topkick

2004-2005 GMC Sierra, Topkick Factory Service Bulletin OBDII Code P1244

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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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