AutoCodes – Chevrolet – P2151 Chevrolet

P2151 Chevrolet 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 Chevrolet 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 3,058

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

What does this mean?

What are the Possible Causes of the DTC P2151 Chevrolet?

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 Chevrolet?

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 Chevrolet 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 Chevrolet code?

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

Need Help with the Code?

Get the P2151 Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

P2151 2014 Chevrolet Silverado — Cylinder 2 Injector High Control Circuit High Voltage
P2151 2015 Chevrolet Silverado — Cylinder 2 Injector High Control Circuit High Voltage
P2151 2016 Chevrolet Silverado — Cylinder 2 Injector High Control Circuit High Voltage
P2151 2017 Chevrolet Silverado — Cylinder 2 Injector High Control Circuit High Voltage
P2151 2018 Chevrolet Silverado — Cylinder 2 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 P2151 Chevrolet Code

1. What does the OBDII code P2151 mean on a Chevrolet?

P2151 indicates a high voltage issue in the Cylinder 2 Injector High Control Circuit, meaning the fuel injector for cylinder 2 may not be functioning properly.

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

Common symptoms include rough idling, reduced engine performance, misfires, poor fuel economy, and potentially an illuminated check engine light.

3. What causes the P2151 code to appear in a Chevrolet?

Possible causes include a faulty fuel injector, damaged wiring or connections in the injector circuit, a malfunctioning injector driver in the PCM, or corrosion in the connectors.

4. Can I drive my Chevrolet with the P2151 code?

Driving with this code is not recommended as it can lead to engine misfires, increased emissions, and potential damage to the catalytic converter if not addressed promptly.

5. How is P2151 diagnosed in a Chevrolet?

A mechanic will use a scan tool to check the code, inspect the injector wiring and connectors for damage or corrosion, and test the injector and PCM for proper functionality.

6. What repairs can fix the P2151 code on a Chevrolet?

Repairs may include replacing the faulty injector, repairing or replacing damaged wiring or connectors, or, in rare cases, replacing the PCM if it's found to be defective.

7. How much does it cost to fix the P2151 code on a Chevrolet?

Repair costs vary but typically range from $200 to $500 depending on whether the issue is with the injector, wiring, or PCM.

8. Can a dirty fuel injector cause the P2151 code?

While not a common cause, a dirty or clogged injector might contribute to performance issues but is less likely to trigger a high control circuit voltage code like P2151.

9. How can I prevent the P2151 code from occurring in my Chevrolet?

Regular maintenance, including cleaning fuel injectors and inspecting wiring for wear or corrosion, can help prevent this issue from occurring.

10. Is a P2151 code specific to Chevrolet vehicles?

No, P2151 can occur in other makes and models, but the diagnostic and repair process may differ depending on the vehicle. Always refer to the manufacturerâ€™s guidelines.