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Engine-Codes – GMC – P1241 GMC

P1241 GMC Code - Injector 7 Output Circuit

Quick Answer

The P1241 GMC code indicates an issue with the injector 7 output circuit in the vehicle's fuel injection system. Common causes include Faulty fuel injector, Wiring or connector damage, Short circuit in the injector circuit. 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
P1241 GMC indicates Injector 7 Output Circuit.
Common causes
Common causes include Faulty fuel injector, Wiring or connector damage, Short circuit in the injector circuit.
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 P1241 GMC Description

The P1241 GMC code indicates an issue with the injector 7 output circuit in the vehicle's fuel injection system. The fuel injector is responsible for delivering fuel into the engine cylinders for combustion. When this circuit malfunctions, it can lead to improper fuel delivery, which may result in engine misfires, poor fuel efficiency, and overall reduced performance.

OBDII Code P1241 GMC - Injector 7 Output Circuit
P1241 GMC Code - Injector 7 Output Circuit

Common Causes of P1241 GMC

  1. Faulty fuel injector
  2. Wiring or connector damage
  3. Short circuit in the injector circuit
  4. Open circuit in the injector circuit
  5. ECM malfunction

Symptoms of P1241 GMC

  1. Engine misfires
  2. Reduced fuel efficiency
  3. Rough idling
  4. Engine stalling
  5. Check Engine Light illuminated

How to Fix P1241 GMC

  1. Use a scan tool to confirm the P1241 code and pinpoint the exact cause of the issue.
  2. Inspect the wiring and connectors for any damage or corrosion, repairing or replacing as needed.
  3. Test the fuel injector for proper operation and replace if faulty.
  4. Check the injector driver within the ECM and repair or replace if necessary.
  5. Clear the code and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1241 GMC

The cost of repairing the injector 7 output circuit issue can vary depending on the exact cause of the problem and the labor rates in your area. On average, you can expect to pay anywhere from $150 to $500 for parts and labor. Keep in mind that diagnostic time and labor rates can vary, so it's best to get a few quotes from different auto repair shops to ensure you're getting a fair price.

What does this mean?

Tech Notes for P1241 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 P1241

Need more information about the P1241 GMC code?

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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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