AutoCodes – Generic – B2621

B2621 Code - Inside Key Antenna 1 Circuit

Quick Answer

The Inside Key Antenna 1 detects whether Intelligent Key is inside the vehicle. Common causes include Faulty Inside Key Antenna, Inside Key Antenna harness is open or shorted, Inside Key Antenna 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: B2621 indicates Inside Key Antenna 1 Circuit.
Common causes: Common causes include Faulty Inside Key Antenna, Inside Key Antenna harness is open or shorted, Inside Key Antenna 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 2,575

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 Jan 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2621 Description

The Inside Key Antenna 1 detects whether Intelligent Key is inside the vehicle. The Inside Key Antenna 1 Installed in the center area of the instrument panel. The Diagnostic Trouble Code (DTC) sets when an excessive high or low voltage from inside antenna is sent to the Body Control Module (BCM).

OBDII Code B2621 - Inside Key Antenna 1 Circuit - AutoCodes.com — B2621 Code - Inside Key Antenna 1 Circuit

What does this mean?

What are the Possible Causes of the DTC B2621?

Faulty Inside Key Antenna
Inside Key Antenna harness is open or shorted
Inside Key Antenna circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B2621?

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 B2621 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 B2621 code?

Need more information on how to fix the B2621 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2621 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2621 Infiniti — Inside Key Antenna 1 Circuit
B2621 Lexus — Communication Interruption
B2621 Nissan — Inside Key Antenna 1 Circuit
B2621 Toyota — Communication Interruption

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 B2621 Code

1. What are the common symptoms of OBDII code B2621 (Inside Key Antenna 1 Circuit)?

- Common symptoms include issues with keyless entry, difficulty starting the vehicle, and possible immobilizer system malfunctions.

2. What could cause OBDII code B2621 to trigger?

- The code B2621 is typically triggered by a malfunction in the inside key antenna circuit, which may be caused by a faulty key antenna, damaged wiring, or a problem with the immobilizer system.

3. How can I diagnose the source of OBDII code B2621?

- To diagnose the source of the code, it is recommended to inspect the key antenna for damage, check the wiring for any breaks or shorts, and perform a thorough scan of the immobilizer system using a diagnostic tool.

4. Can I repair OBDII code B2621 on my own?

- Repairing OBDII code B2621 may require advanced knowledge and specialized tools. It is recommended to consult a professional mechanic or automotive technician for proper diagnosis and repair.

5. Is it safe to continue driving with OBDII code B2621 present?

- It is not recommended to continue driving with OBDII code B2621 present, as it may lead to further issues with the vehicle's immobilizer system and keyless entry functionality.

6. How much does it typically cost to repair OBDII code B2621?

- Repair costs for OBDII code B2621 can vary depending on the underlying cause of the issue. It is best to get a diagnostic assessment from a qualified mechanic to determine the exact cost.

7. Can a low battery cause OBDII code B2621 to trigger?

- A low battery can potentially cause issues with the keyless entry system and trigger OBDII code B2621. It is advisable to ensure the vehicle's battery is in good condition before diagnosing any electrical problems.

8. Are there any preventative measures to avoid OBDII code B2621?

- Regular maintenance of the vehicle's keyless entry system, including checking key fobs and antennas for damage, can help prevent issues that may trigger OBDII code B2621.

9. How long does it take to repair OBDII code B2621?

- The repair time for OBDII code B2621 can vary depending on the extent of the issue and the availability of replacement parts. It is best to consult with a professional mechanic for an accurate estimate.

10. Can weather conditions affect the triggering of OBDII code B2621?

- Extreme weather conditions, such as heavy rain or extreme cold, can potentially affect the key antenna's performance and trigger OBDII code B2621. It is advisable to keep the key antenna clean and dry to prevent weather-related issues.