AutoCodes – Chevrolet – P2146 Chevrolet

P2146 Chevrolet Code - Cylinder 1 Injector High Control Circuit

Quick Answer

The Engine Control Module (ECM) supplies voltage to each fuel injector on the high control circuits. Common causes include Faulty Fuel Injector 1, Fuel Injector 1 harness is open or shorted, Fuel Injector 1 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: P2146 Chevrolet indicates Cylinder 1 Injector High Control Circuit.
Common causes: Common causes include Faulty Fuel Injector 1, Fuel Injector 1 harness is open or shorted, Fuel Injector 1 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 4,121

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 P2146 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 not to factory specifications.

OBDII Code P2146 Chevrolet - Cylinder 1 Injector High Control Circuit - AutoCodes.com — P2146 Chevrolet Code - Cylinder 1 Injector High Control Circuit

What does this mean?

What are the Possible Causes of the DTC P2146 Chevrolet?

Faulty Fuel Injector 1
Fuel Injector 1 harness is open or shorted
Fuel Injector 1 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2146 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 P2146 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 P2146 Chevrolet code?

Need more information on how to fix the P2146 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2146 Chevrolet 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 P2146 Chevrolet Code

1. What does the OBDII code P2146 mean on a Chevrolet?

P2146 indicates a problem in the high control circuit of the fuel injector for cylinder 1, which can affect fuel delivery and engine performance.

2. What are the common symptoms of code P2146 in a Chevrolet?

Symptoms include rough idling, poor acceleration, misfires, reduced fuel efficiency, and possibly an illuminated check engine light.

3. What causes the P2146 code on a Chevrolet?

Common causes include a faulty fuel injector, damaged wiring or connectors, a malfunctioning injector driver module, or issues with the powertrain control module (PCM).

4. Can I drive my Chevrolet with the P2146 code?

Itâ€™s not recommended to drive with this code active, as it can lead to poor engine performance, potential engine damage, or unsafe driving conditions.

5. How do I diagnose the P2146 code on my Chevrolet?

Diagnose by inspecting the injector wiring and connectors, testing the injector driver circuit, and using a multimeter to check for power and ground at the injector.

6. How can I fix the P2146 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 or injector driver module.

7. Is the P2146 code specific to Chevrolet vehicles?

No, P2146 is a generic OBDII code, but its specific symptoms and repair steps can vary based on the make and model of the vehicle.

8. How much does it cost to repair a P2146 code on a Chevrolet?

Repair costs vary depending on the issue. Replacing a fuel injector typically costs $200-$500, while wiring repairs or PCM replacement can be more expensive.

9. Can a clogged fuel injector cause the P2146 code?

No, P2146 specifically relates to an electrical issue in the injectorâ€™s high control circuit, not a mechanical clogging problem.

10. Do I need special tools to fix the P2146 code on a Chevrolet?

Basic tools like a multimeter and an OBDII scanner are required for diagnosis. Advanced repairs may need specialized equipment or professional expertise.