AutoCodes – Chevrolet – P2151 2018 Chevrolet Silverado

P2151 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 211

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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado - Cylinder 2 Injector High Control Circuit High Voltage - AutoCodes.com — P2151 2018 Chevrolet Silverado Code - Cylinder 2 Injector High Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2151 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado code?

Need more information on how to fix the P2151 2018 Chevrolet Silverado 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 P2151 2018 Chevrolet Silverado Code

1. What does OBDII code P2151 mean for my 2018 Chevrolet Silverado?

This code indicates an issue with the Cylinder 2 Injector High Control Circuit having high voltage, which can impact the fuel injector's operation.

2. What are the common symptoms of OBDII code P2151 in a 2018 Chevrolet Silverado?

Common symptoms include rough idling, engine misfires, reduced fuel efficiency, and possibly the Check Engine Light illuminating.

3. What are the possible causes of OBDII code P2151 on a 2018 Chevrolet Silverado?

Causes can include a faulty fuel injector, a wiring issue in the injector circuit, a problem with the Engine Control Module (ECM), or a poor electrical connection.

4. How can I diagnose the Cylinder 2 Injector High Control Circuit issue in my 2018 Chevrolet Silverado?

Diagnosis typically involves checking the injector's wiring harness for damage, testing the injector's resistance, inspecting the ECM connections, and using a scan tool to monitor the injector's operation.

5. Can I still drive my 2018 Chevrolet Silverado with OBDII code P2151?

It's not recommended to drive the vehicle with this code present, as it can lead to poor engine performance and potential damage over time. It's best to address the issue promptly.

6. How can I repair OBDII code P2151 on my 2018 Chevrolet Silverado?

Repair options may include replacing the faulty fuel injector, repairing any damaged wiring, ensuring proper electrical connections, or reprogramming the ECM if needed.

7. Is it possible to reset OBDII code P2151 on a 2018 Chevrolet Silverado without fixing the issue?

While clearing the code temporarily may be possible, it's crucial to address the underlying problem causing the code to prevent further issues and ensure proper vehicle operation.

8. Are there any preventive measures to avoid OBDII code P2151 in a 2018 Chevrolet Silverado?

Regular vehicle maintenance, such as fuel injector cleaning and inspections, checking for wiring issues, and using quality fuel, can help prevent issues leading to this code.

9. Can a DIY enthusiast fix OBDII code P2151 on a 2018 Chevrolet Silverado, or is professional help necessary?

Depending on your skill level and access to tools, some may be able to address this code themselves by following proper diagnostic procedures. However, seeking professional help is recommended if unsure.

10. How much can I expect to spend on repairing OBDII code P2151 in my 2018 Chevrolet Silverado?

Repair costs can vary based on the specific cause of the issue, but expenses may include parts like a new fuel injector, labor for diagnosis and repair, and potential ECM reprogramming.