AutoCodes – GMC – P2154 2017 GMC Sierra

P2154 2017 GMC Sierra Code - Cylinder 3 Injector High 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 Faulty Fuel Injector 3, Fuel Injector 3 harness is open or shorted, Fuel Injector 3 circuit poor electrical connection. 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: P2154 2017 GMC Sierra indicates Cylinder 3 Injector High Control Circuit High Voltage.
Common causes: Common causes include Faulty Fuel Injector 3, Fuel Injector 3 harness is open or shorted, Fuel Injector 3 circuit poor electrical connection.
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 145

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 Sep 08, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2154 2017 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 high voltage supply circuit is shorted to voltage for greater than 2 s.

OBDII Code P2154 2017 GMC Sierra - Cylinder 3 Injector High Control Circuit High Voltage - AutoCodes.com — P2154 2017 GMC Sierra Code - Cylinder 3 Injector High Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2154 2017 GMC Sierra?

Faulty Fuel Injector 3
Fuel Injector 3 harness is open or shorted
Fuel Injector 3 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2154 2017 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2154 2017 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 P2154 2017 GMC Sierra code?

Need more information on how to fix the P2154 2017 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 P2154 2017 GMC Sierra Code

1. What does the OBDII code P2154 mean on a 2017 GMC Sierra?

P2154 indicates a high voltage condition in the Cylinder 3 Injector High Control Circuit, meaning the ECM has detected an electrical issue affecting the fuel injector for cylinder 3.

2. What are the common symptoms of code P2154 in a 2017 GMC Sierra?

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

3. What causes the P2154 code to appear on a 2017 GMC Sierra?

Common causes include a faulty fuel injector, damaged wiring or connectors in the injector circuit, a malfunctioning ECM, or corrosion at the electrical connections.

4. Can I drive my 2017 GMC Sierra with the P2154 code?

Itâ€™s not recommended to drive with this code active, as it can cause further engine damage, reduced performance, and potential safety concerns if the engine misfires.

5. How do I diagnose the P2154 code on a 2017 GMC Sierra?

Diagnosis involves checking the wiring and connectors for damage or corrosion, testing the fuel injector for cylinder 3, and verifying proper voltage and resistance in the circuit.

6. Can a bad fuel injector cause the P2154 code in a 2017 GMC Sierra?

Yes, a faulty or malfunctioning fuel injector for cylinder 3 can cause this code by creating a high voltage condition in the control circuit.

7. How do I fix the P2154 code on a 2017 GMC Sierra?

Repairs may include replacing the faulty injector, repairing or replacing damaged wiring or connectors, cleaning corroded connections, or reprogramming the ECM if necessary.

8. How much does it cost to fix the P2154 code on a 2017 GMC Sierra?

Repair costs depend on the issue but can range from $100 to $300 for wiring repairs and up to $500 or more if the fuel injector requires replacement.

9. What tools are needed to troubleshoot the P2154 code on a 2017 GMC Sierra?

Youâ€™ll need an OBDII scanner, a multimeter for electrical testing, and basic tools to access and inspect the injector and wiring.

10. Can a weak battery cause the P2154 code in a 2017 GMC Sierra?

While uncommon, a weak or failing battery can lead to voltage irregularities that might contribute to this code. Itâ€™s worth testing the battery and charging system.