B279A 2018 Toyota RAV4 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 2018 Toyota RAV4 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 2018 Toyota RAV4 Description
What are the Possible Causes of the DTC B279A 2018 Toyota RAV4?
- 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 2018 Toyota RAV4?
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 2018 Toyota RAV4 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 2018 Toyota RAV4 code?
Need more information on how to fix the B279A 2018 Toyota RAV4 code? Get Access to Factory Service Manuals
Need Help with the Code?
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Frequently Asked Questions about B279A 2018 Toyota RAV4 Code
1. What are the common symptoms of OBDII code B279A in a 2018 Toyota RAV4?
- Common symptoms include the illumination of the security indicator light on the dashboard, difficulty starting the vehicle, and possible issues with the theft deterrent system.
2. What does the OBDII code B279A indicate in a 2018 Toyota RAV4?
- OBDII code B279A signifies a communication line high fixation issue within the theft deterrent system of the vehicle.
3. What are some possible causes of OBDII code B279A in a 2018 Toyota RAV4?
- Potential causes include a faulty security indicator light, issues with the theft deterrent system wiring, a malfunctioning theft deterrent system control module, or a communication error between components.
4. How can I diagnose the OBDII code B279A in a 2018 Toyota RAV4?
- Diagnosis typically involves using an OBDII scanner to retrieve the specific code, checking the security indicator light for abnormalities, and inspecting the wiring and connections related to the theft deterrent system.
5. What are some DIY repair tips for fixing OBDII code B279A in a 2018 Toyota RAV4?
- DIY repair options may include checking and reseating all relevant connections, inspecting the wiring for any visible damage, and resetting the vehicle's computer by disconnecting the battery for a few minutes.
6. Can I drive my 2018 Toyota RAV4 with OBDII code B279A?
- It is not recommended to drive the vehicle with unresolved OBDII code B279A, as it may lead to potential issues with the theft deterrent system and impact the overall operation of the vehicle.
7. How much does it cost to repair OBDII code B279A in a 2018 Toyota RAV4?
- Repair costs can vary depending on the exact cause of the issue. It is advisable to consult a professional mechanic for an accurate diagnosis and cost estimate.
8. Is OBDII code B279A a common problem in 2018 Toyota RAV4 vehicles?
- While not extremely common, OBDII code B279A can occur in 2018 Toyota RAV4 models due to various factors related to the theft deterrent system.
9. Can resetting the OBDII code B279A fix the issue in a 2018 Toyota RAV4?
- Resetting the code may temporarily clear the fault, but it is essential to diagnose and address the root cause of the problem to prevent it from reoccurring.
10. How long does it typically take to repair OBDII code B279A in a 2018 Toyota RAV4?
- The repair time can vary based on the complexity of the issue. Simple fixes like reseating connections may take a short time, while more extensive repairs could require additional investigation and labor.
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