AutoCodes – Hyundai – P2146 Hyundai

P2146 Hyundai Code - Fuel Injector Group 'A' Supply Voltage Circuit Open

Quick Answer

The Gasoline Direct Injection (GDI) system injects high-pressure fuel directly into the combustion chamber. Common causes include Faulty Fuel Injector, Fuel Injector harness is open or shorted, Fuel Injector 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 Hyundai indicates Fuel Injector Group 'A' Supply Voltage Circuit Open.
Common causes: Common causes include Faulty Fuel Injector, Fuel Injector harness is open or shorted, Fuel Injector 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 3,322

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 Aug 24, 2021

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

The Gasoline Direct Injection (GDI) system injects high-pressure fuel directly into the combustion chamber. The high-pressure injectors have an internal swirl disk that rotates with fuel flow to help atomize the discharging fuel. This causes the fuel to evaporate rapidly, which reduces inlet air temperature. This cooler atomized air/fuel inlet charge increases power output.
The GDI injector drive has 2 circuits for the high side. One handles cylinders 1 and 4 and another handles cylinders 2 & 3 so that these paired cylinders always occur the same Diagnostic Trouble Code (DTC).
The Engine Control Module (ECM) shows P2146 when the 1, 4 high, or low side is short circuit ground or short circuit battery.

OBDII Code P2146 Hyundai - Fuel Injector Group 'A' Supply Voltage Circuit Open - AutoCodes.com — P2146 Hyundai Code - Fuel Injector Group 'A' Supply Voltage Circuit Open

What does this mean?

What are the Possible Causes of the DTC P2146 Hyundai?

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

How to Fix the DTC P2146 Hyundai?

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 Hyundai 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.

Frequently Asked Questions about P2146 Hyundai Code

1. What does the OBDII code P2146 mean for a Hyundai?

P2146 indicates an open or malfunction in the Fuel Injector Group 'A' Supply Voltage Circuit, which affects the proper operation of the fuel injectors.

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

Symptoms include rough idling, misfiring, lack of engine power, poor acceleration, increased fuel consumption, and the Check Engine Light turning on.

3. What causes the P2146 code to appear in a Hyundai?

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

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

Driving with this code is not recommended, as it can cause poor engine performance, potential damage to the catalytic converter, and unsafe driving conditions.

5. How is the P2146 code diagnosed in a Hyundai?

A technician will use a scan tool to confirm the code, inspect wiring and connectors for damage, check the fuel injectors, and test the voltage and continuity of the circuit.

6. How do I fix the P2146 code on my Hyundai?

Repairs may involve replacing damaged wiring, repairing poor connections, replacing faulty fuel injectors, or replacing the injector driver module if needed.

7. Can a blown fuse cause the P2146 code in my Hyundai?

Yes, a blown fuse in the fuel injector circuit can cause the P2146 code, as it disrupts the power supply to the injectors.

8. What is the cost to repair a P2146 code on a Hyundai?

Repair costs can range from $100 to $500 or more, depending on whether the issue is wiring-related, injector replacement, or module failure.

9. How can I prevent the P2146 code from recurring on my Hyundai?

Regularly check wiring and connectors for damage or corrosion, ensure proper maintenance of the fuel system, and address any engine performance issues promptly.

10. What happens if I ignore the P2146 code on my Hyundai?

Ignoring this code can lead to worsening engine performance, damage to the catalytic converter, and potentially higher repair costs in the future.