B279A Scion 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 Scion 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 Scion Description
What are the Possible Causes of the DTC B279A Scion?
- 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 Scion?
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 Scion 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.
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Frequently Asked Questions about B279A Scion Code
1. What are the common symptoms of OBDII code B279A in a Scion related to the Theft Deterrent System Communication Line High Fixation?
- Common symptoms include the inability to start the vehicle, the security light staying illuminated, and issues with key fob recognition.
2. What are the possible causes of OBDII code B279A in a Scion related to the Theft Deterrent System Communication Line High Fixation?
- Possible causes include a faulty key fob, problems with the immobilizer system, a damaged communication line, or issues with the theft deterrent control module.
3. How can I diagnose OBDII code B279A in a Scion related to the Theft Deterrent System Communication Line High Fixation?
- Diagnosis typically involves using a diagnostic scanner to read the code, checking the key fob functionality, inspecting the communication line for damage, and testing the theft deterrent control module.
4. Can I fix OBDII code B279A in a Scion related to the Theft Deterrent System Communication Line High Fixation myself?
- While some basic troubleshooting steps can be taken, resolving this issue may require specialized tools and expertise. It is recommended to consult a professional mechanic for proper diagnosis and repair.
5. Are there any temporary fixes or workarounds for OBDII code B279A in a Scion related to the Theft Deterrent System Communication Line High Fixation?
- Temporary fixes such as disconnecting the battery to reset the system may work in some cases, but it is important to address the root cause of the issue to prevent it from recurring.
6. How much does it typically cost to repair OBDII code B279A in a Scion related to the Theft Deterrent System Communication Line High Fixation?
- The cost of repair can vary depending on the specific cause of the issue and the labor rates in your area. It is advisable to obtain quotes from different mechanics or dealerships for an accurate estimate.
7. Is it safe to continue driving my Scion with OBDII code B279A related to the Theft Deterrent System Communication Line High Fixation?
- It is not recommended to drive the vehicle with unresolved security system issues, as it may lead to potential security risks or the vehicle not starting at all. Address the problem promptly.
8. Can extreme weather conditions affect OBDII code B279A in a Scion related to the Theft Deterrent System Communication Line High Fixation?
- Extreme temperatures or moisture can potentially impact the components involved in the theft deterrent system, leading to communication errors or malfunctions. Take precautions in such conditions.
9. Will resetting the ECM clear OBDII code B279A in a Scion related to the Theft Deterrent System Communication Line High Fixation?
- Resetting the ECM may temporarily clear the code, but if the underlying issue persists, the code is likely to reappear. Proper diagnosis and repair are necessary for a permanent solution.
10. How long does it typically take to repair OBDII code B279A in a Scion related to the Theft Deterrent System Communication Line High Fixation?
- The repair time can vary depending on the complexity of the issue and the availability of parts. It is advisable to consult with a mechanic to get an estimate of the repair duration.
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