AutoCodes – GMC – P054F 2018 GMC Sierra

P054F 2018 GMC Sierra Code - Idle Control Fuel Quantity Higher Than Expected

Quick Answer

The idle speed directly depends on the injection quantity. Common causes include Contaminated or improper fuel quality, Faulty Fuel Injector, Fuel Injector harness is open or shorted. 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: P054F 2018 GMC Sierra indicates Idle Control Fuel Quantity Higher Than Expected.
Common causes: Common causes include Contaminated or improper fuel quality, Faulty Fuel Injector, Fuel Injector harness is open or shorted.
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 180

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 22, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
Comments
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Code P054F 2018 GMC Sierra Description

The idle speed directly depends on the injection quantity. The monitor compares the commanded injection quantity with calculated thresholds. The commanded idle fuel needs to be between 50 percent of max and min expected fuel. The expected fuel is dependent on accessory loads, ambient temperature, BARO, engine coolant temperature, and engine speed. The Diagnostic Trouble Code (DTC) will be set when a fault is detected when the current fuel injection quantity is higher than the allowed limit for greater than 24 s.

OBDII Code P054F 2018 GMC Sierra - Idle Control Fuel Quantity Higher Than Expected - AutoCodes.com — P054F 2018 GMC Sierra Code - Idle Control Fuel Quantity Higher Than Expected

What does this mean?

What are the Possible Causes of the DTC P054F 2018 GMC Sierra?

Contaminated or improper fuel quality
Faulty Fuel Injector
Fuel Injector harness is open or shorted
Fuel Injector circuit poor electrical connection

How to Fix the DTC P054F 2018 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

Contaminated or improper fuel quality may cause this DTC to set.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P054F 2018 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 P054F 2018 GMC Sierra 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.