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Engine-Codes – Infiniti – B2623 Infiniti

B2623 Infiniti Code - Inside Key Antenna 3 Circuit

Quick Answer

The B2623 code in an Infiniti vehicle indicates a problem with the Inside Key Antenna 3 Circuit. Common causes include Damaged wiring or connectors in the key antenna circuit, Faulty key fob transmitter, Damaged antenna coil. 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
B2623 Infiniti indicates Inside Key Antenna 3 Circuit.
Common causes
Common causes include Damaged wiring or connectors in the key antenna circuit, Faulty key fob transmitter, Damaged antenna coil.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code B2623 Infiniti Description

The B2623 code in an Infiniti vehicle indicates a problem with the Inside Key Antenna 3 Circuit. This circuit is responsible for receiving signals from the key fob and transmitting them to the vehicle's immobilizer system to allow the engine to start. When this circuit malfunctions, it can lead to issues with starting the vehicle, as the immobilizer system may not recognize the key fob signal.

OBDII Code B2623 Infiniti - Inside Key Antenna 3 Circuit
B2623 Infiniti Code - Inside Key Antenna 3 Circuit

Common Causes of B2623 Infiniti

  1. Damaged wiring or connectors in the key antenna circuit.
  2. Faulty key fob transmitter.
  3. Damaged antenna coil.
  4. Malfunctioning immobilizer system.
  5. Water or moisture damage to the key antenna components.

Symptoms of B2623 Infiniti

  1. Difficulty starting the engine or intermittent starting issues.
  2. Engine stalling or cutting out unexpectedly.
  3. Alarm system malfunction or false alarms.
  4. Keyless entry system not working properly.
  5. Vehicle going into a "no-start" mode.

How to Fix B2623 Infiniti

  1. Begin by conducting a visual inspection of the key antenna circuit, looking for any visible signs of damage or corrosion.
  2. Test the key fob transmitter to ensure it is sending signals properly.
  3. Check the antenna coil for any damage or wear, replacing it if necessary.
  4. Use a diagnostic scanner to reset the immobilizer system and reprogram the key fob to the vehicle.
  5. Clear the B2623 code from the vehicle's computer and test the system to ensure the issue has been resolved.

Cost to Fix B2623 Infiniti

The typical repair costs for addressing the B2623 code in an Infiniti vehicle can range from $200 to $500, depending on the specific cause of the issue and the cost of replacement parts. This estimate includes both parts and labor. It is important to note that diagnosis time and labor rates at auto repair shops can vary, so it is advisable to check local rates for a more precise estimate. Additionally, rates at dealerships or in metropolitan areas may be higher, while independent shops often charge less.

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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 B2623 Infiniti Code

1. What does the OBDII code B2623 mean on an Infiniti?

B2623 indicates a malfunction in the Inside Key Antenna 3 Circuit, which is part of the keyless entry and ignition system.

2. What are the common symptoms of code B2623 in an Infiniti?

Common symptoms include difficulty starting the vehicle, a key not detected message, and unresponsive keyless entry functions.

3. What causes the B2623 code to appear on an Infiniti?

This code is typically caused by a faulty inside key antenna, damaged wiring, a poor electrical connection, or a malfunctioning keyless entry control module.

4. How is the B2623 code diagnosed in an Infiniti?

A technician will use a scan tool to retrieve the code, visually inspect the wiring and connectors, and test the inside key antenna for proper function.

5. Can I still drive my Infiniti with the B2623 code?

You may still be able to drive, but intermittent issues with starting or unlocking the vehicle could occur. It’s best to address the issue promptly.

6. How do you fix the B2623 code on an Infiniti?

Repairs may involve replacing the inside key antenna, repairing or replacing damaged wires, or reprogramming the keyless entry system.

7. How much does it cost to repair the B2623 code in an Infiniti?

Costs vary depending on the exact issue but can range from $150 to $500, including parts and labor.

8. Can a weak key fob battery cause the B2623 code?

While a weak key fob battery can cause similar symptoms, it is not the direct cause of the B2623 code, which relates to the inside key antenna circuit.

9. Does the B2623 code require reprogramming the key fob?

Not necessarily. Reprogramming is only needed if a new component, such as the keyless entry module, is installed.

10. Can I fix the B2623 code on my Infiniti myself?

If you have experience with automotive electrical systems, you can check and repair wiring or replace the antenna. Otherwise, it’s best to consult a professional.

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