Engine-CodesToyota – B279A Toyota

B279A Toyota Code - Theft Deterrent System Communication Line High Fixation

Quick Answer

The B279A code for Toyota vehicles refers to an issue with the Theft Deterrent System Communication Line being in a high fixation state. Common causes include Faulty wiring or connections in the theft deterrent system, A malfunctioning theft deterrent control module, Corrosion or damage to the communication lines. 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 Toyota indicates Theft Deterrent System Communication Line High Fixation.
Common causes
Common causes include Faulty wiring or connections in the theft deterrent system, A malfunctioning theft deterrent control module, Corrosion or damage to the communication lines.
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.
Table of contents Created and updated by William Orellana on Aug 19, 2024
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Code B279A Toyota Description

The B279A code for Toyota vehicles refers to an issue with the Theft Deterrent System Communication Line being in a high fixation state. This means that there is a problem with the communication line that connects the various 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 malfunctions, it can lead to issues with the system's operation, potentially causing the vehicle to be vulnerable to theft.

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

Common Causes of B279A Toyota

  1. Faulty wiring or connections in the theft deterrent system.
  2. A malfunctioning theft deterrent control module.
  3. Corrosion or damage to the communication lines.
  4. Electrical interference or a short circuit in the system.
  5. Software issues with the theft deterrent system.

Symptoms of B279A Toyota

  1. The vehicle may not start or may have difficulty starting.
  2. The security light on the dashboard may stay on or flash repeatedly.
  3. The remote keyless entry system may not work properly.
  4. The vehicle's alarm system may not activate when needed.
  5. The engine may go into a reduced power mode.

How to Fix B279A Toyota

  1. Check and repair any faulty wiring or connections in the theft deterrent system.
  2. Test and, if necessary, replace the theft deterrent control module.
  3. Inspect and clean any corroded or damaged communication lines.
  4. Diagnose and address any electrical interference or short circuits in the system.
  5. Update or reprogram the software in the theft deterrent system.

Cost to Fix B279A Toyota

The cost of repairing a B279A code for Toyota vehicles can vary depending on the specific cause of the issue and the labor rates in your area. On average, the repair cost for this type of issue can range from $200 to $500, including parts and labor. However, it's important to note that prices can fluctuate based on the severity of the problem and the need for any replacement parts. Additionally, labor rates can vary, with most auto repair shops charging between $80 and $150 per hour. It's recommended to contact local repair shops for a more accurate cost estimate.

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Information for Specific Toyota Models

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 Toyota Code

1. What are common symptoms of OBDII code B279A Toyota related to Theft Deterrent System Communication Line High Fixation?

- Common symptoms include the vehicle not starting, the security light flashing, or the engine stalling unexpectedly.

2. What can cause the OBDII code B279A Toyota to trigger Theft Deterrent System Communication Line High Fixation?

- The code can be triggered by issues with the security system module, faulty wiring, a damaged communication line, or a malfunction in the immobilizer system.

3. How serious is the OBDII code B279A Toyota for Theft Deterrent System Communication Line High Fixation?

- The code indicates a problem with the vehicle's theft deterrent system, which can impact the security and functionality of the vehicle. It is important to address this issue promptly.

4. How can I diagnose the OBDII code B279A Toyota for Theft Deterrent System Communication Line High Fixation?

- Diagnosis typically involves using a scan tool to retrieve the specific code, checking the wiring and connections related to the theft deterrent system, and testing the components for proper function.

5. What are some DIY repair tips for fixing the OBDII code B279A Toyota related to Theft Deterrent System Communication Line High Fixation?

- DIY repair tips may include checking and repairing any damaged wiring, ensuring all connections are secure, resetting the security system, or replacing faulty components if necessary.

6. Can I drive my vehicle with the OBDII code B279A Toyota indicating Theft Deterrent System Communication Line High Fixation?

- It is not recommended to drive the vehicle with this code active, as it may lead to security issues or potential vehicle malfunctions. It's best to address the problem before driving.

7. How much does it typically cost to repair the OBDII code B279A Toyota for Theft Deterrent System Communication Line High Fixation?

- The cost of repair can vary depending on the specific issue causing the code. It may range from a simple wiring repair to replacing components within the theft deterrent system.

8. Can resetting the OBDII code B279A Toyota related to Theft Deterrent System Communication Line High Fixation fix the issue?

- Resetting the code may temporarily clear the warning light, but it will not fix the underlying problem causing the code to trigger. Proper diagnosis and repair are necessary for a lasting solution.

9. How long does it take to repair the OBDII code B279A Toyota for Theft Deterrent System Communication Line High Fixation?

- The repair time can vary depending on the complexity of the issue. Simple fixes like repairing a loose connection may take a short time, while more involved repairs could take longer.

10. Should I take my vehicle to a professional mechanic for the OBDII code B279A Toyota related to Theft Deterrent System Communication Line High Fixation?

- It is recommended to seek the expertise of a professional mechanic or dealership specializing in Toyota vehicles to accurately diagnose and repair the issue related to this specific OBDII code.

Discuss the causes and fixes for B279A Toyota OBDII Code

  • b279a dtc fixed in toyota etios

  • Start by reprogramming the ignition key.

  • I checked the key coding on the immobilizer it is still stored. What else could it be? or how do I check the communication from ECM-Immobilizer

  • Hello. Let me check if I can find more information. What model and year is your vehicle?

  • hi my 2006 toyota blade gave me B279a code keyless entry its starts then it cuts out.

  • Either you have to replace or reprogram the car keys.

  • My 2008 Toyota gives me a B279a code . The car doesn't crank nor start wat could b the cause

  • You have to replace or reprogram the keys

  • Hi, My Car ETIOS 2012 Diesel is showing B279A code and P1604
    when we will erase the code car will start but if we off the car then start then same problem occur(car not start) and getting the same code as I mentioned above. Car wire already checked everything is fine. could you please suggest what we need to do.

  • Do you have more than one key? do you get the code with all the keys?

  • 2020 TOYOTA COROLLA 26416 MILES CODE B279A12 CRANK NO START, TOWED TO DEALER, SAID NEED TO REPLACE IMMOBILIZER ? 2000. 00 DOLLARS, NEED HELP (WARRANTEE?)

  • You should contact Toyota Motors or another dealer, it should be covered under the regular warranty.