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Engine-Codes – GMC – P2151 2017 GMC Sierra

P2151 2017 GMC Sierra Code - Cylinder 2 Injector High Control Circuit High Voltage

Quick Answer

The diagnostic trouble code P2151 for a 2017 GMC Sierra specifically refers to an issue with the Cylinder 2 Injector High Control Circuit High Voltage. Common causes include Faulty fuel injector in cylinder 2, Wiring issues such as shorts or open circuits, ECM malfunction. 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 2017 GMC Sierra indicates Cylinder 2 Injector High Control Circuit High Voltage.
Common causes
Common causes include Faulty fuel injector in cylinder 2, Wiring issues such as shorts or open circuits, ECM malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 15, 2024
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Code P2151 2017 GMC Sierra Description

The diagnostic trouble code P2151 for a 2017 GMC Sierra specifically refers to an issue with the Cylinder 2 Injector High Control Circuit High Voltage. This code indicates that the Engine Control Module (ECM) has detected a high voltage condition in the control circuit for the fuel injector in cylinder 2. The fuel injector is responsible for delivering the precise amount of fuel into the combustion chamber for efficient and optimal engine performance. When the control circuit voltage is too high, it can lead to improper fuel delivery, affecting the air-fuel mixture ratio and potentially causing engine misfires, rough idling, and decreased fuel efficiency.

OBDII Code P2151 2017 GMC Sierra - Cylinder 2 Injector High Control Circuit High Voltage
P2151 2017 GMC Sierra Code - Cylinder 2 Injector High Control Circuit High Voltage

Common Causes of P2151 2017 GMC Sierra

  1. Faulty fuel injector in cylinder 2
  2. Wiring issues such as shorts or open circuits
  3. ECM malfunction
  4. Poor electrical connections
  5. Fuel system contamination or blockage

Symptoms of P2151 2017 GMC Sierra

  1. Engine misfires or rough idling
  2. Decreased fuel efficiency
  3. Loss of power or acceleration
  4. Check Engine Light illuminated
  5. Strong fuel odor from the exhaust

How to Fix P2151 2017 GMC Sierra

  1. Diagnose the issue by using a scan tool to monitor the fuel injector control circuit voltage and resistance.
  2. Inspect the wiring harness for any damage, corrosion, or loose connections. Repair or replace as necessary.
  3. Test the fuel injector in cylinder 2 for proper operation and replace if found to be faulty.
  4. Clear the trouble code from the ECM memory and perform a test drive to verify that the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to pinpoint the exact cause, such as testing the ECM or checking for fuel system contamination.

Cost to Fix P2151 2017 GMC Sierra

The typical repair costs for addressing a P2151 code on a 2017 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a fuel injector can range from $150 to $300 per injector, while labor costs can add another $100 to $200 per hour. Wiring repairs or ECM replacement may incur additional costs. Overall, the total repair bill for this issue could range from $300 to $800 or more, depending on the extent of the repairs needed. It's recommended to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on your vehicle's specific condition and location. Keep in mind that labor rates can vary, so it's advisable to shop around for the best deal.

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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 P2151 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code P2151 in a 2017 GMC Sierra related to the Cylinder 2 Injector High Control Circuit High Voltage?

- Common symptoms include rough idling, engine misfires, decreased fuel efficiency, and potentially, the Check Engine light coming on.

2. What are the possible causes of OBDII code P2151 in a 2017 GMC Sierra indicating an issue with the Cylinder 2 Injector High Control Circuit High Voltage?

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

3. How can I diagnose the OBDII code P2151 in my 2017 GMC Sierra related to the Cylinder 2 Injector High Control Circuit High Voltage?

- To diagnose this issue, you may need to perform a thorough inspection of the injector wiring, check the injector resistance, and use a scan tool to monitor the injector control circuit voltage.

4. What are some repair tips for resolving OBDII code P2151 in a 2017 GMC Sierra associated with the Cylinder 2 Injector High Control Circuit High Voltage?

- Some repair tips include checking and repairing any damaged wiring, replacing the faulty fuel injector, ensuring proper connection of electrical components, and clearing the error code after the repair.

5. Can driving with OBDII code P2151 in my 2017 GMC Sierra due to the Cylinder 2 Injector High Control Circuit High Voltage cause further damage?

- Continuing to drive with this issue can potentially lead to engine performance issues, increased fuel consumption, and further damage to engine components, so it is recommended to address the problem promptly.

6. Is it possible to reset the OBDII code P2151 in a 2017 GMC Sierra related to the Cylinder 2 Injector High Control Circuit High Voltage without fixing the underlying issue?

- While you can clear the error code using a scan tool, it is crucial to address the root cause of the problem to prevent the code from reoccurring and potentially causing more significant issues.

7. How much does it typically cost to repair OBDII code P2151 in a 2017 GMC Sierra associated with the Cylinder 2 Injector High Control Circuit High Voltage?

- The cost of repairing this issue can vary depending on the exact cause of the problem, but it may involve expenses for parts, labor, and diagnostic services, ranging from a few hundred to over a thousand dollars.

8. Can a DIY enthusiast with basic automotive knowledge fix OBDII code P2151 in a 2017 GMC Sierra related to the Cylinder 2 Injector High Control Circuit High Voltage?

- Depending on the exact cause of the issue, a DIY enthusiast with adequate tools and knowledge may be able to address simple wiring or connector problems but should seek professional help for more complex repairs involving fuel injectors or ECM.

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