AutoCodes – Chevrolet – P0279 2018 Chevrolet Silverado

P0279 2018 Chevrolet Silverado Code - Cylinder 7 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 7, Faulty Fuel Injector 7, Plugged Fuel Injector 7. 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: P0279 2018 Chevrolet Silverado indicates Cylinder 7 Injector Control Circuit Low Voltage.
Common causes: Common causes include Dirty Fuel Injector 7, Faulty Fuel Injector 7, Plugged Fuel Injector 7.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 271

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0279 2018 Chevrolet Silverado 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 P0279 2018 Chevrolet Silverado - Cylinder 7 Injector Control Circuit Low Voltage - AutoCodes.com — P0279 2018 Chevrolet Silverado Code - Cylinder 7 Injector Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0279 2018 Chevrolet Silverado?

Dirty Fuel Injector 7
Faulty Fuel Injector 7
Plugged Fuel Injector 7
Fuel injector 7 harness is open or shorted
Fuel injector 7 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0279 2018 Chevrolet Silverado?

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 P0279 2018 Chevrolet Silverado 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 P0279 2018 Chevrolet Silverado code?

Need more information on how to fix the P0279 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0279 2018 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

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 P0279 2018 Chevrolet Silverado Code

What does the OBDII code P0279 mean for a 2018 Chevrolet Silverado?

Code P0279 indicates a low voltage issue in the Cylinder 7 injector control circuit, which may affect fuel delivery and engine performance.

What are the common symptoms of code P0279 in a 2018 Chevrolet Silverado?

Symptoms may include rough idling, engine misfires, decreased fuel efficiency, and reduced power from the engine.

What causes code P0279 in a 2018 Chevrolet Silverado?

Possible causes include a faulty fuel injector, damaged wiring or connectors, issues with the PCM, or low system voltage.

Can a bad fuel injector cause the P0279 code?

Yes, a malfunctioning fuel injector can lead to low voltage readings in the control circuit, triggering the P0279 code.

How can I diagnose code P0279 on my 2018 Chevrolet Silverado?

Begin by inspecting the wiring and connectors for Cylinder 7’s injector, testing the injector itself, and checking for PCM-related issues.

Can I drive my 2018 Chevrolet Silverado with code P0279?

Driving with this code is not recommended as it can lead to engine misfires, reduced performance, and potential damage over time.

How do I fix code P0279 on a 2018 Chevrolet Silverado?

Repairs may involve replacing the faulty injector, repairing damaged wiring or connectors, or reprogramming or replacing the PCM.

Is the P0279 code expensive to fix?

The cost depends on the root cause, but replacing a fuel injector or repairing wiring is typically less expensive than PCM replacement.

Can a low battery voltage cause the P0279 code?

Yes, insufficient battery voltage or a failing alternator can contribute to low voltage in the injector circuit and trigger this code.

Do I need to clear the P0279 code after repairs?

Yes, after addressing the issue, use an OBDII scanner to clear the code and verify the repair was successful.

Discuss the causes and fixes for P0279 2018 Chevrolet Silverado OBDII Code

Submit a New Comment

Code P0279 2018 Chevrolet Silverado comments

No comments found for this page.

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.