AutoCodes – GMC – P054F GMC

P054F GMC 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 GMC 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 347

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Mar 22, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P054F GMC 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 GMC - Idle Control Fuel Quantity Higher Than Expected - AutoCodes.com — P054F GMC Code - Idle Control Fuel Quantity Higher Than Expected

What does this mean?

What are the Possible Causes of the DTC P054F GMC?

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 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

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 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 P054F GMC code?

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Need Help with the Code?

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Information for Specific GMC Models

P054F 2014 GMC Sierra — Idle Control Fuel Quantity Higher Than Expected
P054F 2015 GMC Sierra — Idle Control Fuel Quantity Higher Than Expected
P054F 2016 GMC Sierra — Idle Control Fuel Quantity Higher Than Expected
P054F 2017 GMC Sierra — Idle Control Fuel Quantity Higher Than Expected
P054F 2018 GMC Sierra — Idle Control Fuel Quantity Higher Than Expected

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 P054F GMC Code

What does the OBDII code P054F mean on a GMC vehicle?

1. P054F indicates that the engine control module (ECM) has detected that the idle control fuel quantity is higher than expected, which could signal an issue with fuel delivery or idle control systems. 2.

What are the common symptoms of code P054F in a GMC?

Common symptoms include rough idling, increased fuel consumption, difficulty starting the engine, or the check engine light being illuminated. 3.

What causes the P054F code to appear on a GMC?

Possible causes include a malfunctioning fuel injector, a faulty idle air control valve, a vacuum leak, a dirty throttle body, or issues with the ECM software. 4.

Can a clogged throttle body trigger the P054F code?

Yes, a dirty or clogged throttle body can interfere with the air-fuel mixture, potentially causing the P054F code to appear. 5.

How can I diagnose the P054F code on my GMC?

Start by checking for vacuum leaks, inspecting the throttle body for buildup, testing the idle air control valve, and using a diagnostic scanner to monitor fuel and idle control data. 6.

Is it safe to drive a GMC with the P054F code?

While it may be possible to drive with this code, it is not recommended as it can lead to poor engine performance, increased fuel consumption, or further damage if left unaddressed. 7.

How do I fix the P054F code on my GMC?

Repairs may include cleaning the throttle body, replacing a faulty idle air control valve, addressing vacuum leaks, or reprogramming the ECM if the issue is software-related. 8.

Can a faulty idle air control valve cause the P054F code?

Yes, a malfunctioning idle air control valve can lead to inaccurate fuel quantity adjustments, triggering the P054F code. 9.

What tools are needed to troubleshoot the P054F code on a GMC?

Youâ€™ll need an OBDII scanner, a multimeter for electrical testing, and tools to inspect and clean components like the throttle body and fuel injectors. 10.

Does the P054F code require ECM reprogramming on a GMC?

In some cases, ECM reprogramming may be necessary if the issue stems from outdated software or incorrect calibration settings.