AutoCodes – GMC – P2154 2014 GMC Sierra

P2154 2014 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 2014 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 150

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 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 high voltage supply circuit is shorted to voltage for greater than 2 s.

OBDII Code P2154 2014 GMC Sierra - Cylinder 3 Injector High Control Circuit High Voltage - AutoCodes.com — P2154 2014 GMC Sierra Code - Cylinder 3 Injector High Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2154 2014 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 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2154 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 P2154 2014 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.

Frequently Asked Questions about P2154 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code P2154 in a 2014 GMC Sierra related to the Cylinder 3 Injector High Control Circuit High Voltage?

- Common symptoms include rough idle, engine misfires, decreased fuel efficiency, and potentially the illumination of the Check Engine light.

2. What are the possible causes of OBDII code P2154 in a 2014 GMC Sierra?

- Possible causes include a faulty fuel injector in cylinder 3, wiring issues in the injector circuit, a malfunctioning Engine Control Module (ECM), or a poor electrical connection.

3. How can I diagnose the cause of OBDII code P2154 in my 2014 GMC Sierra?

- Diagnosis typically involves inspecting the wiring and connections related to the cylinder 3 fuel injector, testing the injector's resistance and operation, and using a scan tool to check for any other related trouble codes.

4. Can I continue driving my 2014 GMC Sierra with OBDII code P2154 present?

- It is not recommended to drive the vehicle with this code present, as it can lead to engine performance issues and potential damage if left unresolved.

5. How can I repair OBDII code P2154 in my 2014 GMC Sierra?

- Repairing this code may involve replacing the fuel injector in cylinder 3, repairing any damaged wiring or connections, resetting the ECM, and clearing the trouble codes with a scan tool.

6. Are there any DIY tips for addressing OBDII code P2154 in a 2014 GMC Sierra?

- While some basic troubleshooting steps can be taken, addressing this code often requires specialized tools and knowledge. It is recommended to consult a qualified mechanic for proper diagnosis and repair.

7. How much does it typically cost to fix OBDII code P2154 in a 2014 GMC Sierra?

- The cost of fixing this code can vary depending on the specific issue causing it, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Are there any recalls or technical service bulletins related to OBDII code P2154 in a 2014 GMC Sierra?

- It's advisable to check with a GMC dealership or online resources for any relevant recalls or technical service bulletins that may be related to this specific OBDII code in your vehicle.

9. Is it possible for OBDII code P2154 to come back after being repaired in a 2014 GMC Sierra?

- If the root cause of the code is not properly addressed during the repair, there is a chance that the code may reappear. It's crucial to ensure that all related components are thoroughly inspected and repaired.

10. Can a faulty oxygen sensor trigger OBDII code P2154 in a 2014 GMC Sierra?

- While a faulty oxygen sensor is not a common direct cause of this specific code, it's essential to address any other related trouble codes and issues that may impact the overall engine performance and emissions system in the vehicle.