B2799 2017 Toyota RAV4 Code - Engine Immobiliser System Malfunction
Quick Answer
The Engine Control Module (ECM) stores this Diagnostic Trouble Code (DTC) when the communication line between the ECM and Transponder Key ECU Assembly is malfunctioning, or the communication ID of the ECM and Transponder Key ECU Assembly does not match. Common causes include Without Smart Key, Faulty Transponder Key ECU Assembly, Transponder Key ECU Assembly harness is open or shorted. 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
- B2799 2017 Toyota RAV4 indicates Engine Immobiliser System Malfunction.
- Common causes
- Common causes include Without Smart Key, Faulty Transponder Key ECU Assembly, Transponder Key ECU Assembly harness is open or shorted.
- 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 B2799 2017 Toyota RAV4 Description
For vehicles with Smart Key, this DTC will be set when there are communication malfunctions between the ECM and certification ECU (Smart Key ECU Assembly), or when the communication ID codes do not match, the ECM stores this DTC.
Before troubleshooting this DTC, ensure that no DTC is detected in the transponder key ECU. If there is a key code-related DTC detected in the Transponder Key ECU Assembly or Certification ECU (Smart Key ECU Assembly), repair it first.
What are the Possible Causes of the DTC B2799 2017 Toyota RAV4?
-
Without Smart Key
- Faulty Transponder Key ECU Assembly
- Transponder Key ECU Assembly harness is open or shorted
- Transponder Key ECU Assembly circuit poor electrical connection
- Faulty Engine Control Module (ECM)
With Smart Key - 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 B2799 2017 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 B2799 2017 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 B2799 2017 Toyota RAV4 code?
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Need Help with the Code?
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Frequently Asked Questions about B2799 2017 Toyota RAV4 Code
1. What are the common symptoms of OBDII code B2799 in a 2017 Toyota RAV4?
- The common symptoms include difficulty starting the vehicle, the engine not turning over, and the engine immobilizer system warning light illuminating on the dashboard.
2. What does the OBDII code B2799 indicate in a 2017 Toyota RAV4?
- OBDII code B2799 indicates an engine immobilizer system malfunction in the 2017 Toyota RAV4.
3. What are the possible causes of the engine immobilizer system malfunction in a 2017 Toyota RAV4?
- Possible causes of the engine immobilizer system malfunction include issues with the key fob, faulty immobilizer system components, wiring issues, or a problem with the Engine Control Module (ECM).
4. How can I diagnose the engine immobilizer system malfunction in my 2017 Toyota RAV4?
- Diagnosing the issue typically involves checking the key fob battery, ensuring the key is programmed correctly, inspecting the immobilizer system components, and conducting a thorough ECM scan for any related fault codes.
5. Can I still drive my 2017 Toyota RAV4 with the engine immobilizer system malfunction code B2799?
- Driving with the engine immobilizer system malfunction may not be safe or possible, as the vehicle may not start or could stall unexpectedly. It is recommended to address the issue promptly.
6. How can I reset or clear the OBDII code B2799 in my 2017 Toyota RAV4?
- Clearing the B2799 code typically involves fixing the underlying issue causing the engine immobilizer system malfunction. Once the issue is resolved, a scan tool can be used to clear the code.
7. Is it possible to repair the engine immobilizer system malfunction in a 2017 Toyota RAV4 without professional help?
- While some basic troubleshooting like checking the key fob battery can be done at home, diagnosing and repairing complex issues related to the engine immobilizer system may require professional assistance.
8. Are there any DIY tips to prevent the engine immobilizer system malfunction in my 2017 Toyota RAV4?
- Keeping the key fob battery in good condition, avoiding exposure to water or physical damage, and ensuring proper key programming are some DIY tips to help prevent the engine immobilizer system malfunction.
9. How much does it typically cost to repair the engine immobilizer system malfunction in a 2017 Toyota RAV4?
- The cost of repairing the engine immobilizer system malfunction can vary depending on the underlying issue. It is recommended to consult a professional for an accurate diagnosis and cost estimate.
10. Can the engine immobilizer system malfunction in a 2017 Toyota RAV4 be a recurring issue?
- If the root cause of the engine immobilizer system malfunction is not properly addressed, it may recur. Regular maintenance and prompt attention to any warning signs can help prevent recurring issues.
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