AutoCodes – Nissan – P2146 Nissan

P2146 Nissan Code - No. 1 And 4 Cylinder Fuel Injector Power Supply Circuit Open

Quick Answer

The fuel injector is a small, precise solenoid valve. Common causes include Faulty Fuel Injector No, 1 And 4, Fuel Injector No. 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 Nissan indicates No. 1 And 4 Cylinder Fuel Injector Power Supply Circuit Open.
Common causes: Common causes include Faulty Fuel Injector No, 1 And 4, Fuel Injector No.
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 6,102

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P2146 Nissan Description

The fuel injector is a small, precise solenoid valve. When the Engine Control Module (ECM) supplies a ground to the fuel injector circuit, the coil in the fuel injector is energized. The energized coil pulls the needle valve back and allows fuel to flow through the fuel injector into the cylinder. The amount of fuel injected depends upon the injection pulse duration. Pulse duration is the length of time the fuel injector remains open. The ECM controls the injection pulse duration based on engine fuel needs.

OBDII Code P2146 Nissan - No. 1 And 4 Cylinder Fuel Injector Power Supply Circuit Open - AutoCodes.com — P2146 Nissan Code - No. 1 And 4 Cylinder Fuel Injector Power Supply Circuit Open

What does this mean?

What are the Possible Causes of the DTC P2146 Nissan?

Faulty Fuel Injector No. 1 And 4
Fuel Injector No. 1 And 4 harness is open or shorted
Fuel Injector No. 1 And 4 circuit poor electrical connection

How to Fix the DTC P2146 Nissan?

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 Nissan 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.

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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.