Engine-Codes.com
Engine-Codes – Generic – B279A

B279A Code - Theft Deterrent System Communication Line High Fixation

Quick Answer

The B279A code indicates a problem with the theft deterrent system communication line being in a high fixation state. Common causes include Faulty communication module, Wiring issues, Damaged component in the theft deterrent system. 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
B279A indicates Theft Deterrent System Communication Line High Fixation.
Common causes
Common causes include Faulty communication module, Wiring issues, Damaged component in the theft deterrent system.
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 07, 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 B279A Description

The B279A code indicates a problem with the theft deterrent system communication line being in a high fixation state. This means that there is a communication issue between the different components of the vehicle's anti-theft system. The theft deterrent system is designed to prevent unauthorized access to the vehicle and protect it from theft. When this communication line is compromised, it can lead to various issues affecting the vehicle's security and overall performance.

OBDII Code B279A - Theft Deterrent System Communication Line High Fixation
B279A Code - Theft Deterrent System Communication Line High Fixation

Common Causes of B279A

  1. Faulty communication module
  2. Wiring issues
  3. Damaged component in the theft deterrent system
  4. Software glitch

Symptoms of B279A

  1. Engine not starting
  2. Security system malfunctions
  3. Inability to arm or disarm the security system
  4. False alarms
  5. Vehicle shutting off unexpectedly

How to Fix B279A

  1. Diagnose the specific cause of the communication line issue using a diagnostic scanner.
  2. Inspect the wiring and connections in the theft deterrent system for any damage or corrosion.
  3. Test the communication module for proper functioning or replace it if necessary.
  4. Reset the system and reprogram any affected components.
  5. Clear the code from the vehicle's computer and test the system to ensure the issue has been resolved.

Cost to Fix B279A

The cost of repairing a theft deterrent system communication line issue can vary depending on the specific cause of the problem and the labor rates in your area. On average, the repair cost for this issue can range from $200 to $500, including parts and labor. It's essential to consult with a professional mechanic to get an accurate estimate based on your vehicle's make and model. Keep in mind that additional diagnostic time may be needed to pinpoint the exact cause of the problem, which can affect the overall repair cost.

Need more information about the B279A code?

Need more information on how to fix the B279A code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B279A code diagnosed by a professional: Find a repair shop in your area

Code B279A Information for Specific Makes

  • B279A Lexus — Theft Deterrent System Communication Line High Fixation
  • B279A Scion — Theft Deterrent System Communication Line High Fixation
  • B279A Toyota — Theft Deterrent System Communication Line High Fixation
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 B279A Code

1. What are the common symptoms of OBDII code B279A (Theft Deterrent System Communication Line High Fixation)?

The common symptoms include issues starting the vehicle, illumination of the security light on the dashboard, and possible immobilization of the vehicle.

2. What can cause OBDII code B279A to trigger?

The code B279A is typically triggered by a communication error between the theft deterrent system components, such as faulty wiring, a defective control module, or a disrupted communication line.

3. How can I diagnose OBDII code B279A?

Diagnosing code B279A involves using a diagnostic scanner to read the code, inspecting the communication lines and connections, and testing the theft deterrent system components for proper operation.

4. What are the possible repair options for OBDII code B279A?

Repair options for code B279A may include repairing or replacing damaged wiring, resetting the control module, reprogramming the system, or replacing faulty components like the immobilizer or key.

5. Can I fix OBDII code B279A myself?

While diagnosing the code is possible for DIY enthusiasts with the right tools, fixing the issue may require specialized knowledge and equipment. It is recommended to consult a professional mechanic for proper repair.

6. How urgent is it to address OBDII code B279A?

While the vehicle may still be operable with code B279A, it is crucial to address the issue promptly to prevent potential security system malfunctions and ensure the vehicle's proper operation.

7. Will resetting the code resolve OBDII code B279A?

Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing code B279A. Proper diagnosis and repair are necessary to resolve the problem effectively.

8. Is OBDII code B279A a common issue in certain vehicle makes or models?

Code B279A can be more prevalent in vehicles equipped with sophisticated theft deterrent systems, such as newer models from certain manufacturers. However, it can occur in various makes and models.

9. Can extreme weather conditions trigger OBDII code B279A?

Extreme weather conditions, such as moisture or temperature fluctuations, can potentially affect the communication lines and components related to the theft deterrent system, leading to the triggering of code B279A.

10. How much does it typically cost to repair OBDII code B279A?

The cost of repairing code B279A can vary depending on the extent of the issue, the required repairs or replacements, and labor costs. It is advisable to obtain quotes from different mechanics for an accurate estimate.

Discuss the causes and fixes for B279A OBDII Code

Submit a New Comment

Code B279A comments

No comments found for this page.