B279A Toyota Code - Theft Deterrent System Communication Line High Fixation
Quick Answer
The Diagnostic Trouble Code (DTC) will be set in the Engine Control Module (ECM) when the communication line (IMI - EFIO) between the Engine Control Module and the Certification ECU (Smart Key ECU Assembly) is stuck high. Common causes include Faulty Certification ECU (Smart Key ECU Assembly), Certification ECU harness is open or shorted, Certification ECU 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
- B279A Toyota indicates Theft Deterrent System Communication Line High Fixation.
- Common causes
- Common causes include Faulty Certification ECU (Smart Key ECU Assembly), Certification ECU harness is open or shorted, Certification ECU 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.
Code B279A Toyota Description
What are the Possible Causes of the DTC B279A Toyota?
- Faulty Certification ECU (Smart Key ECU Assembly)
- Certification ECU harness is open or shorted
- Certification ECU circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC B279A Toyota?
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 B279A Toyota 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 B279A Toyota code?
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Information for Specific Toyota Models
- B279A 2013 Toyota RAV4 — Theft Deterrent System Communication Line High Fixation
- B279A 2014 Toyota RAV4 — Theft Deterrent System Communication Line High Fixation
- B279A 2015 Toyota RAV4 — Theft Deterrent System Communication Line High Fixation
- B279A 2016 Toyota RAV4 — Theft Deterrent System Communication Line High Fixation
- B279A 2017 Toyota RAV4 — Theft Deterrent System Communication Line High Fixation
- B279A 2018 Toyota RAV4 — Theft Deterrent System Communication Line High Fixation
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
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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
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Hello. Let me check if I can find more information. What model and year is your vehicle?
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hi my 2006 toyota blade gave me B279a code keyless entry its starts then it cuts out.
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My 2008 Toyota gives me a B279a code . The car doesn't crank nor start wat could b the cause
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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. -
2020 TOYOTA COROLLA 26416 MILES CODE B279A12 CRANK NO START, TOWED TO DEALER, SAID NEED TO REPLACE IMMOBILIZER ? 2000. 00 DOLLARS, NEED HELP (WARRANTEE?)
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You should contact Toyota Motors or another dealer, it should be covered under the regular warranty.
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