Engine-Codes.com
Engine-Codes – Generic – B2784

B2784 Code - Antenna Coil Open / Short

Quick Answer

The B2784 diagnostic trouble code indicates that there is an issue with the antenna coil in the vehicle. Common causes include Damaged or corroded antenna coil wiring, Faulty antenna coil module, Water damage to antenna coil components. 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
B2784 indicates Antenna Coil Open / Short.
Common causes
Common causes include Damaged or corroded antenna coil wiring, Faulty antenna coil module, Water damage to antenna coil components.
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 08, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code B2784 Description

The B2784 diagnostic trouble code indicates that there is an issue with the antenna coil in the vehicle. The antenna coil is a crucial component of the vehicle's keyless entry system, as it is responsible for transmitting and receiving signals between the key fob and the vehicle. When the antenna coil is open or shorted, it can lead to problems with the keyless entry system, potentially preventing the vehicle from starting or locking/unlocking properly.

OBDII Code B2784 - Antenna Coil Open / Short
B2784 Code - Antenna Coil Open / Short

Common Causes of B2784

  1. Damaged or corroded antenna coil wiring
  2. Faulty antenna coil module
  3. Water damage to antenna coil components
  4. Electrical short in the antenna coil system
  5. Poor connection between antenna coil and keyless entry system

Symptoms of B2784

  1. Keyless entry system not working properly
  2. Vehicle not starting with key fob
  3. Inconsistent locking/unlocking of doors
  4. Alarm system malfunctions
  5. Battery drain issues

How to Fix B2784

  1. Begin by diagnosing the specific cause of the issue using a diagnostic scanner to confirm the B2784 code.
  2. Inspect the antenna coil wiring for any damage or corrosion, repairing or replacing any affected wires.
  3. Check the antenna coil module for proper functioning and replace it if necessary.
  4. Ensure there is no water damage to the antenna coil components, drying them out or replacing them as needed.
  5. Test the connection between the antenna coil and the keyless entry system to ensure a secure and reliable connection.

Cost to Fix B2784

The typical repair costs for addressing a B2784 code can vary depending on the specific cause of the issue and the extent of the repairs needed. On average, the parts for replacing an antenna coil or wiring can range from $50 to $200, while the labor costs can range from $100 to $300. Overall, the total repair costs for this issue can range from $150 to $500. It's important to note that these estimates are approximate, and actual costs may vary based on factors such as location, vehicle make and model, and the specific repair shop's rates. It is recommended to obtain quotes from local auto repair shops for a more accurate cost estimate.

Need more information about the B2784 code?

Need more information on how to fix the B2784 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2784 code diagnosed by a professional: Find a repair shop in your area

Code B2784 Information for Specific Makes

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 B2784 Code

1. What are the common symptoms of OBDII code B2784 (Antenna Coil Open / Short)?

The common symptoms include issues with keyless entry, remote start malfunction, and difficulty starting the vehicle.

2. What are the possible causes of OBDII code B2784?

The code B2784 can be caused by a faulty antenna coil, damaged wiring, poor electrical connections, or a malfunctioning key fob.

3. How can I diagnose the cause of OBDII code B2784?

Diagnosing the code involves checking the antenna coil for continuity, inspecting the wiring for damage, testing the key fob, and verifying electrical connections.

4. Can a DIY enthusiast repair OBDII code B2784 at home?

Some repairs related to OBDII code B2784, such as checking and replacing the antenna coil or repairing damaged wiring, can be done by a DIY enthusiast with the right tools and knowledge.

5. Is it safe to continue driving with OBDII code B2784 triggered?

While the vehicle may still be operable with the code triggered, it is recommended to address the issue promptly to prevent further problems with keyless entry and remote start functionality.

6. How much does it typically cost to repair OBDII code B2784?

The cost of repairing OBDII code B2784 can vary depending on the specific cause and the labor rates of the repair shop. Anticipate costs for parts and labor to address the issue.

7. Can a low car battery trigger OBDII code B2784?

Yes, a low car battery can potentially trigger OBDII code B2784 due to insufficient power supply affecting the antenna coil and key fob communication.

8. Are there any preventive measures to avoid OBDII code B2784 in the future?

Regularly inspecting the antenna coil, checking the key fob battery, and ensuring proper electrical connections can help prevent OBDII code B2784 from occurring.

9. Will resetting the OBDII system clear code B2784?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue such as a faulty antenna coil or damaged wiring is not addressed, the code is likely to return.

10. Can OBDII code B2784 affect other vehicle systems?

While OBDII code B2784 primarily relates to the antenna coil and keyless entry system, unresolved issues can potentially impact other vehicle systems that rely on proper signal transmission and connectivity.

Discuss the causes and fixes for B2784 OBDII Code

Submit a New Comment

Code B2784 comments

No comments found for this page.