B2799 2018 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 2018 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 2018 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 2018 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 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 B2799 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 B2799 2018 Toyota RAV4 code?
Need more information on how to fix the B2799 2018 Toyota RAV4 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B2799 2018 Toyota RAV4 code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about B2799 2018 Toyota RAV4 Code
1. What does the OBDII code B2799 on a 2018 Toyota RAV4 indicate?
The code B2799 indicates an Engine Immobiliser System Malfunction in a 2018 Toyota RAV4.
2. What are the common symptoms of an Engine Immobiliser System Malfunction?
Common symptoms include the engine not starting, the engine starting and immediately stalling, or the engine cranking but not starting.
3. What are the possible causes of the B2799 code in a 2018 Toyota RAV4?
Possible causes include a faulty immobiliser system, issues with the key fob or key transponder, a malfunctioning engine control module (ECM), or wiring problems.
4. How can I diagnose the cause of the Engine Immobiliser System Malfunction in my 2018 Toyota RAV4?
Diagnosing the issue may require using a diagnostic scan tool to retrieve the specific fault codes, checking the key fob battery, examining the key transponder, and inspecting the wiring connections.
5. Can I fix the B2799 code in my 2018 Toyota RAV4 myself?
Depending on the cause of the code, some fixes may be DIY-friendly, such as replacing the key fob battery or reprogramming the key transponder. However, more complex issues may require professional diagnosis and repair.
6. Is it safe to continue driving my 2018 Toyota RAV4 with the Engine Immobiliser System Malfunction code?
It is not recommended to drive the vehicle with an active Engine Immobiliser System Malfunction code, as it may lead to unexpected stalling or starting issues while on the road.
7. Are there any temporary solutions to try if my 2018 Toyota RAV4 shows the B2799 code?
You can try disconnecting the car battery for a few minutes and reconnecting it to reset the system. If the code persists, seek professional help to avoid potential further damage.
8. How much does it typically cost to repair the Engine Immobiliser System Malfunction in a 2018 Toyota RAV4?
The cost of repair can vary depending on the cause of the issue. Simple fixes like replacing a key fob battery may be relatively inexpensive, while more complex problems could require more extensive repairs.
9. Can a B2799 code be triggered by a dead car battery in a 2018 Toyota RAV4?
A dead car battery can sometimes cause the B2799 code to appear, especially if it leads to a temporary loss of power to the immobiliser system. Try jump-starting the vehicle and see if the code clears.
10. How can I prevent the Engine Immobiliser System Malfunction in my 2018 Toyota RAV4?
Regular maintenance, such as replacing key fob batteries when low, ensuring key transponders are in good condition, and addressing any wiring issues promptly, can help prevent the occurrence of the B2799 code.
Discuss the causes and fixes for B2799 2018 Toyota RAV4 OBDII Code
Code B2799 2018 Toyota RAV4 comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
