AutoCodes – GMC – P2151 2016 GMC Sierra

P2151 2016 GMC Sierra Code - Cylinder 2 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 2, Fuel Injector 2 harness is open or shorted, Fuel Injector 2 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: P2151 2016 GMC Sierra indicates Cylinder 2 Injector High Control Circuit High Voltage.
Common causes: Common causes include Faulty Fuel Injector 2, Fuel Injector 2 harness is open or shorted, Fuel Injector 2 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 558

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 P2151 2016 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 P2151 2016 GMC Sierra - Cylinder 2 Injector High Control Circuit High Voltage - AutoCodes.com — P2151 2016 GMC Sierra Code - Cylinder 2 Injector High Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2151 2016 GMC Sierra?

Faulty Fuel Injector 2
Fuel Injector 2 harness is open or shorted
Fuel Injector 2 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2151 2016 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 P2151 2016 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 P2151 2016 GMC Sierra code?

Need more information on how to fix the P2151 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2151 2016 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 P2151 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code P2151 in a 2016 GMC Sierra?

The common symptoms of code P2151 include rough idling, engine misfires, decreased fuel efficiency, and potential stalling of the vehicle.

2. What does the OBDII code P2151 for a 2016 GMC Sierra indicate?

Code P2151 indicates an issue with the Cylinder 2 Injector High Control Circuit High Voltage in the fuel injection system of the vehicle.

3. What are the possible causes of OBDII code P2151 in a 2016 GMC Sierra?

Possible causes of code P2151 include a faulty fuel injector, wiring issues in the injector circuit, a malfunctioning Engine Control Module (ECM), or a poor electrical connection.

4. How can I troubleshoot a Cylinder 2 Injector High Control Circuit High Voltage issue in my 2016 GMC Sierra?

To troubleshoot code P2151, start by inspecting the wiring and connections related to the Cylinder 2 injector. Check for any visible damage or corrosion that may be affecting the circuit.

5. Can a DIY enthusiast repair OBDII code P2151 in a 2016 GMC Sierra?

While some experienced DIY enthusiasts may be able to address code P2151 by checking and repairing wiring issues, it is recommended to seek professional help for proper diagnosis and repair of the fuel injector circuit.

6. Is it safe to continue driving my 2016 GMC Sierra with OBDII code P2151 present?

It is not recommended to continue driving your vehicle with code P2151 present, as it can lead to further damage to the engine and potentially unsafe driving conditions.

7. How much does it typically cost to repair OBDII code P2151 in a 2016 GMC Sierra?

The cost of repairing code P2151 can vary depending on the exact cause of the issue. It is advisable to consult a mechanic for an accurate diagnosis and cost estimate.

8. Will resetting the OBDII code P2151 in my 2016 GMC Sierra make it go away permanently?

Simply resetting the code may temporarily clear the check engine light, but if the underlying issue causing code P2151 is not addressed, the code is likely to reappear.

9. Can a dirty fuel injector cause OBDII code P2151 in a 2016 GMC Sierra?

While a dirty fuel injector can potentially cause issues with fuel delivery, code P2151 is more commonly associated with electrical circuit problems rather than injector cleanliness.

10. How urgent is it to address OBDII code P2151 in a 2016 GMC Sierra?

It is important to address code P2151 promptly to prevent further damage to the engine and ensure the proper functioning of the fuel injection system in your 2016 GMC Sierra.