AutoCodes – GMC – P2154 GMC

P2154 GMC 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 GMC 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 1,206

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
Cost to Diagnose
FAQs
Comments
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Code P2154 GMC 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 GMC - Cylinder 3 Injector High Control Circuit High Voltage - AutoCodes.com — P2154 GMC Code - Cylinder 3 Injector High Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2154 GMC?

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 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2154 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 P2154 GMC code?

Need more information on how to fix the P2154 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific GMC Models

P2154 2014 GMC Sierra — Cylinder 3 Injector High Control Circuit High Voltage
P2154 2015 GMC Sierra — Cylinder 3 Injector High Control Circuit High Voltage
P2154 2016 GMC Sierra — Cylinder 3 Injector High Control Circuit High Voltage
P2154 2017 GMC Sierra — Cylinder 3 Injector High Control Circuit High Voltage
P2154 2018 GMC Sierra — Cylinder 3 Injector High Control Circuit High Voltage

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 GMC Code

1. What are the common symptoms of OBDII code P2154 GMC (Cylinder 3 Injector High Control Circuit High Voltage)?

The common symptoms include rough idling, engine misfires, decreased fuel efficiency, and the illumination of the Check Engine Light.

2. What can cause the OBDII code P2154 GMC to trigger?

The code P2154 is typically triggered by issues such as a faulty fuel injector, wiring problems in the cylinder 3 injector circuit, or a problem with the Engine Control Module (ECM).

3. How can I diagnose the cause of OBDII code P2154 GMC?

Diagnosis involves using an OBDII scanner to read the code, performing a visual inspection of the injector wiring, checking the fuel injector for proper functioning, and testing the ECM for any faults.

4. Can a dirty fuel injector cause OBDII code P2154 GMC to appear?

Yes, a dirty or clogged fuel injector can disrupt the injector circuit's voltage, leading to the triggering of code P2154.

5. What are some repair tips for resolving OBDII code P2154 GMC?

Repair tips include cleaning or replacing the fuel injector, repairing any damaged wiring in the injector circuit, and resetting the ECM to clear the code.

6. Is it safe to continue driving with OBDII code P2154 GMC present?

It is not recommended to continue driving with this code active, as it can lead to further engine damage and decreased performance.

7. Can I reset the OBDII code P2154 GMC myself?

Yes, you can reset the code using an OBDII scanner or by disconnecting the car's battery for a few minutes. However, it is important to diagnose and address the underlying issue causing the code to prevent it from reoccurring.

8. How much does it typically cost to repair OBDII code P2154 GMC?

The cost of repair can vary depending on the exact cause of the issue, but it can range from $100 to $500, including parts and labor.

9. Will OBDII code P2154 GMC cause permanent damage to the engine if not addressed promptly?

Continued driving with this code present can potentially cause damage to the engine, especially if the underlying issue is related to fuel delivery or combustion problems.

10. Can weather conditions or temperature affect the appearance of OBDII code P2154 GMC?

Extreme weather conditions or temperature fluctuations can sometimes affect the performance of the fuel injector and the injector circuit, potentially leading to the triggering of code P2154.