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AutoCodes – GMC – P0276 GMC

P0276 GMC Code - Cylinder 6 Injector Control Circuit Low Voltage

Quick Answer

The Engine Control Module (ECM) supplies voltage to each Fuel Injector on the high control circuits. Common causes include Dirty Fuel Injector 6, Faulty Fuel Injector 6, Plugged Fuel Injector 6. 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
P0276 GMC indicates Cylinder 6 Injector Control Circuit Low Voltage.
Common causes
Common causes include Dirty Fuel Injector 6, Faulty Fuel Injector 6, Plugged Fuel Injector 6.
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.
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Code Popularity 428
How popular is this code, among other codes? Low
What is this?
Table of contents Created and updated by William Orellana on Mar 23, 2024
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Code P0276 GMC Description

The Engine Control Module (ECM) supplies voltage to each Fuel Injector on the high control circuits. The ECM energizes each fuel injector by grounding the low control circuit of the fuel injector. The ECM monitors the status of the fuel injector circuits. When a fuel injector circuit condition is detected by the ECM, the affected fuel injector(s) is disabled. The Diagnostic Trouble Code (DTC) will be set when the ECM detects the fuel injector control circuit is shorted to ground for greater than 2 s.
OBDII Code P0276 GMC - Cylinder 6 Injector Control Circuit Low Voltage - AutoCodes.com
P0276 GMC Code - Cylinder 6 Injector Control Circuit Low Voltage
What does this mean?

What are the Possible Causes of the DTC P0276 GMC?

  • Dirty Fuel Injector 6
  • Faulty Fuel Injector 6
  • Plugged Fuel Injector 6
  • Fuel injector 6 harness is open or shorted
  • Fuel injector 6 circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

How to Fix the DTC P0276 GMC?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0276 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0276 GMC code?

Need more information on how to fix the P0276 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0276 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

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.

Frequently Asked Questions about P0276 GMC Code

1. What does the OBDII code P0276 mean on a GMC vehicle?

P0276 indicates a low voltage issue in the injector control circuit for cylinder 6, which means the engine control module (ECM) is detecting a problem with the injector’s electrical signal.

2. What are the common symptoms of code P0276 in a GMC?

Common symptoms include rough idling, misfires, reduced engine performance, poor fuel economy, and an illuminated check engine light.

3. What causes the P0276 code to appear on a GMC?

The most common causes include a faulty fuel injector, damaged wiring or connectors in the injector circuit, a malfunctioning ECM, or low fuel pressure.

4. How can I diagnose the P0276 code on a GMC?

Start by inspecting the wiring and connectors for damage or corrosion, testing the cylinder 6 injector for proper operation, and using a multimeter to check the voltage and continuity in the injector circuit.

5. Can I drive my GMC with the P0276 code?

It is not recommended to drive with this code, as it can lead to engine misfires, increased emissions, and potential damage to other components if left unaddressed.

6. How can I fix the P0276 code on my GMC?

Repairs may include replacing the cylinder 6 fuel injector, repairing or replacing damaged wiring or connectors, addressing low fuel pressure, or reprogramming or replacing the ECM if faulty.

7. How much does it cost to fix the P0276 code on a GMC?

Repair costs vary depending on the root cause, but replacing a fuel injector typically costs between $200 and $600, while wiring repairs or ECM replacements may increase the cost.

8. Can a bad fuel injector cause the P0276 code on a GMC?

Yes, a faulty fuel injector is one of the most common reasons for this code, as it can fail to receive or send the proper electrical signal.

9. What tools are needed to troubleshoot the P0276 code on a GMC?

You’ll need an OBDII scan tool, a multimeter for electrical testing, and possibly a fuel pressure gauge to diagnose the issue accurately.

10. Will clearing the P0276 code fix the problem on my GMC?

Clearing the code will temporarily remove the check engine light, but the underlying issue must be resolved to prevent the code from returning.

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