AutoCodes – GMC – P0274 2014 GMC Sierra

P0274 2014 GMC Sierra Code - Cylinder 5 Injector Control Circuit High 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 5, Faulty Fuel Injector 5, Plugged Fuel Injector 5. 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: P0274 2014 GMC Sierra indicates Cylinder 5 Injector Control Circuit High Voltage.
Common causes: Common causes include Dirty Fuel Injector 5, Faulty Fuel Injector 5, Plugged Fuel Injector 5.
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 169

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 23, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0274 2014 GMC Sierra 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 voltage for greater than 2 s.

OBDII Code P0274 2014 GMC Sierra - Cylinder 5 Injector Control Circuit High Voltage - AutoCodes.com — P0274 2014 GMC Sierra Code - Cylinder 5 Injector Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0274 2014 GMC Sierra?

Dirty Fuel Injector 5
Faulty Fuel Injector 5
Plugged Fuel Injector 5
Fuel injector 5 harness is open or shorted
Fuel injector 5 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0274 2014 GMC Sierra?

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 P0274 2014 GMC Sierra 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 P0274 2014 GMC Sierra code?

Need more information on how to fix the P0274 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the 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.

Frequently Asked Questions about P0274 2014 GMC Sierra Code

1. What does OBDII code P0274 mean for a 2014 GMC Sierra?

P0274 indicates that the injector control circuit for cylinder 5 is experiencing a high voltage condition.

2. What are common symptoms of code P0274 in a GMC Sierra?

Symptoms may include rough idling, misfires, reduced fuel efficiency, poor acceleration, and an illuminated check engine light.

3. What causes code P0274 in a 2014 GMC Sierra?

Possible causes include a faulty fuel injector, damaged wiring or connectors, a malfunctioning PCM, or electrical short circuits.

4. Can I drive my GMC Sierra with code P0274?

Driving with code P0274 is possible but not recommended, as it may lead to engine damage or reduced performance over time.

5. How do you diagnose P0274 in a GMC Sierra?

Diagnosis involves inspecting the wiring and connectors for cylinder 5, testing the fuel injector, and checking the PCM for faults.

6. How do you fix code P0274 on a 2014 GMC Sierra?

Repairs may include replacing the faulty injector, repairing damaged wiring or connectors, or reprogramming or replacing the PCM if necessary.

7. Can code P0274 be caused by a bad PCM in a GMC Sierra?

Yes, a malfunctioning PCM can cause injector control circuit faults, including high voltage conditions.

8. How much does it cost to fix code P0274 on a 2014 GMC Sierra?

Repair costs can range from $150 to $500 or more, depending on whether the issue is with the injector, wiring, or PCM.

9. Will clearing code P0274 solve the issue permanently?

Clearing the code may remove the check engine light temporarily, but the underlying problem must be fixed to prevent recurrence.

10. How can I prevent P0274 from occurring in my GMC Sierra?

Regular maintenance, including inspecting wiring and connectors and using high-quality fuel, can help prevent injector-related issues.

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