AutoCodes – Toyota – B2797 2015 Toyota RAV4

B2797 2015 Toyota RAV4 Code - Communication Malfunction No. 1 Immobilizer System

Quick Answer

This Diagnostic Trouble Code (DTC) is output when a communication error occurs between the key slot and transponder key ECU. Common causes include Faulty Key, Faulty Transponder Key Coil, Faulty Transponder Key ECU Assembly. 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: B2797 2015 Toyota RAV4 indicates Communication Malfunction No. 1 Immobilizer System.
Common causes: Common causes include Faulty Key, Faulty Transponder Key Coil, Faulty Transponder Key ECU Assembly.
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.

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Code Popularity 182

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 16, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2797 2015 Toyota RAV4 Description

This Diagnostic Trouble Code (DTC) is output when a communication error occurs between the key slot and transponder key ECU. The DTC B2797 is stored when a key with a BCC malfunction is inserted into the ignition key cylinder.

OBDII Code B2797 2015 Toyota RAV4 - Communication Malfunction No. 1 Immobilizer System - AutoCodes.com — B2797 2015 Toyota RAV4 Code - Communication Malfunction No. 1 Immobilizer System

What does this mean?

What are the Possible Causes of the DTC B2797 2015 Toyota RAV4?

Faulty Key
Faulty Transponder Key Coil
Faulty Transponder Key ECU Assembly

How to Fix the DTC B2797 2015 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 B2797 2015 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 B2797 2015 Toyota RAV4 code?

Need more information on how to fix the B2797 2015 Toyota RAV4 code? Get Access to Factory Service Manuals

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B2797 2015 Toyota RAV4 Code

1. What does OBDII code B2797 on a 2015 Toyota RAV4 mean?

The code B2797 indicates a Communication Malfunction No. 1 in the Immobilizer System of the vehicle.

2. What are the common symptoms of OBDII code B2797 in a 2015 Toyota RAV4?

Common symptoms include difficulty starting the vehicle, the engine not turning over, or the engine starting and then immediately shutting off.

3. What are the possible causes of OBDII code B2797 in a 2015 Toyota RAV4?

Possible causes include a faulty immobilizer system, issues with the key or key fob, wiring problems, or a malfunction in the electronic control unit (ECU).

4. How can I diagnose the Communication Malfunction No. 1 Immobilizer System error in my 2015 Toyota RAV4?

Diagnosis typically involves checking the key or key fob, inspecting the wiring connections, and using a diagnostic tool to scan for specific error codes in the immobilizer system.

5. Can I still drive my 2015 Toyota RAV4 with OBDII code B2797 present?

It is not recommended to drive the vehicle with this code present, as it may lead to starting or immobilization issues while on the road.

6. How can I reset or clear the B2797 code on my 2015 Toyota RAV4?

Clearing the code typically involves using an OBDII scanner to reset the ECU after addressing the underlying issue with the immobilizer system.

7. Is it possible to repair OBDII code B2797 in a 2015 Toyota RAV4 by myself?

While some basic troubleshooting steps can be taken, diagnosing and repairing the immobilizer system issue may require specialized tools and expertise, so seeking professional help is recommended.

8. Are there any DIY tips to prevent OBDII code B2797 from occurring in my 2015 Toyota RAV4?

Regularly checking the condition of your keys, ensuring proper wiring connections, and avoiding water damage to the immobilizer system can help prevent this code from appearing.

9. Will fixing OBDII code B2797 in my 2015 Toyota RAV4 be expensive?

The cost of repair can vary depending on the specific cause of the issue. Simple fixes like reprogramming keys may be less expensive, while replacing the ECU or immobilizer system components can be more costly.

10. How long can I expect the repair of OBDII code B2797 in my 2015 Toyota RAV4 to take?

The repair time can vary based on the complexity of the issue. Simple fixes may be completed quickly, while more involved repairs may require additional time for diagnosis and parts replacement.