AutoCodes – GMC – P0261 2014 GMC Sierra

P0261 2014 GMC Sierra Code - Cylinder 1 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 1, Faulty Fuel Injector 1, Plugged Fuel Injector 1. 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: P0261 2014 GMC Sierra indicates Cylinder 1 Injector Control Circuit Low Voltage.
Common causes: Common causes include Dirty Fuel Injector 1, Faulty Fuel Injector 1, Plugged Fuel Injector 1.
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 208

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 P0261 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 ground for greater than 2 s.

OBDII Code P0261 2014 GMC Sierra - Cylinder 1 Injector Control Circuit Low Voltage - AutoCodes.com — P0261 2014 GMC Sierra Code - Cylinder 1 Injector Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0261 2014 GMC Sierra?

Dirty Fuel Injector 1
Faulty Fuel Injector 1
Plugged Fuel Injector 1
Fuel Injector #1 harness is open or shorted
Fuel Injector #1 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0261 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 P0261 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 P0261 2014 GMC Sierra code?

Need more information on how to fix the P0261 2014 GMC Sierra code? Get Access to Factory Service Manuals

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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 P0261 2014 GMC Sierra Code

What does the OBDII code P0261 mean on a 2014 GMC Sierra?

P0261 indicates a low voltage condition in the Cylinder 1 injector control circuit, meaning the engine control module (ECM) is detecting insufficient electrical activity to properly control fuel injection for that cylinder.

What are common symptoms of code P0261 on a GMC Sierra?

Symptoms may include rough idling, engine misfires, poor fuel economy, reduced engine performance, or the check engine light being illuminated.

What causes the P0261 code to appear on a 2014 GMC Sierra?

Common causes include a faulty fuel injector, wiring issues such as damaged or corroded connectors, a malfunctioning ECM, or low system voltage due to a weak battery or alternator.

Can I drive my 2014 GMC Sierra with a P0261 code?

While the truck may still run, driving with this code can lead to decreased performance, potential engine damage, and increased emissions. It’s best to address the issue as soon as possible.

How do I diagnose the P0261 code on a GMC Sierra?

Start by inspecting the injector wiring and connectors for damage or corrosion. Use a multimeter to check for proper voltage and continuity, and test the injector itself for proper operation.

How can I fix the P0261 code on a 2014 GMC Sierra?

Repairs may involve replacing the faulty injector, repairing or replacing damaged wiring or connectors, or updating/replacing the ECM if necessary.

Can a weak battery cause the P0261 code?

Yes, a weak battery or alternator can result in low system voltage, potentially triggering this code due to insufficient power reaching the injector.

How much does it cost to fix a P0261 code on a GMC Sierra?

Repair costs vary depending on the specific issue but may range from $100–$400 for wiring repairs or injector replacement. ECM replacement can cost significantly more, typically $500–$1,500.

How do I prevent the P0261 code from reoccurring?

Regular maintenance, including inspecting injector wiring, keeping battery connections clean, and ensuring the electrical system is in good condition, can help prevent this code from reoccurring.

Can a P0261 code cause long-term damage to my GMC Sierra?

If left unresolved, it can lead to engine misfires, decreased performance, and potential damage to the catalytic converter due to unburned fuel.