AutoCodes – Lexus – B2793 Lexus

B2793 Lexus Code - Transponder Chip Malfunction

Quick Answer

This Diagnostic Trouble Code (DTC) is output when trouble is found in a key during the key code registration, or the key code is not registered normally. 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: B2793 Lexus indicates Transponder Chip Malfunction.
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 4,799

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 B2793 Lexus Description

This Diagnostic Trouble Code (DTC) is output when trouble is found in a key during the key code registration, or the key code is not registered normally. Replace the key when the key code registration is not performed normally, and this DTC is detected.

OBDII Code B2793 Lexus - Transponder Chip Malfunction - AutoCodes.com — B2793 Lexus Code - Transponder Chip Malfunction

What does this mean?

What are the Possible Causes of the DTC B2793 Lexus?

Faulty Key
Faulty Transponder Key Coil
Faulty Transponder Key ECU Assembly

How to Fix the DTC B2793 Lexus?

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 B2793 Lexus 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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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 B2793 Lexus Code

1. What are common symptoms of OBDII code B2793 in a Lexus related to transponder chip malfunction?

- Common symptoms include difficulty starting the vehicle, the engine not turning over, and the immobilizer system not recognizing the key.

2. What are the possible causes of OBDII code B2793 in a Lexus indicating a transponder chip malfunction?

- The code B2793 can be triggered by issues with the transponder chip in the key, a faulty key fob, or a problem with the immobilizer system in the vehicle.

3. How can I diagnose the OBDII code B2793 in my Lexus to confirm a transponder chip malfunction?

- To diagnose the issue, you can try using a spare key to start the vehicle. If the spare key works without any problems, it is likely that the original key's transponder chip is malfunctioning.

4. Can I repair the transponder chip malfunction causing OBDII code B2793 in my Lexus myself?

- Repairing a transponder chip malfunction usually requires specialized tools and programming equipment. It is recommended to seek assistance from a professional automotive locksmith or dealership.

5. Will replacing the key fob solve the OBDII code B2793 issue in my Lexus?

- Replacing the key fob may resolve the issue if the problem lies with the transponder chip inside the key. However, it is important to have the new key programmed correctly to the vehicle's immobilizer system.

6. How much does it typically cost to repair a transponder chip malfunction causing OBDII code B2793 in a Lexus?

- The cost of repairing a transponder chip malfunction can vary depending on the exact cause of the issue. It is recommended to obtain quotes from automotive locksmiths or dealerships for an accurate estimate.

7. Can I drive my Lexus with OBDII code B2793 related to a transponder chip malfunction?

- It is not advisable to continue driving your Lexus with a transponder chip malfunction as it can lead to potential starting issues and immobilization of the vehicle.

8. How long does it take to repair a transponder chip malfunction causing OBDII code B2793 in a Lexus?

- The repair time can vary depending on the extent of the issue and the availability of replacement parts. In some cases, the repair can be completed within a few hours.

9. Is it possible to reset the OBDII code B2793 related to a transponder chip malfunction in my Lexus without professional help?

- Resetting the code may temporarily clear the error, but if the underlying issue with the transponder chip is not addressed, the code is likely to reappear. Professional assistance is recommended for a permanent solution.

10. Can a low battery in the key fob trigger OBDII code B2793 in a Lexus due to a transponder chip malfunction?

- Yes, a low battery in the key fob can sometimes cause communication issues with the transponder chip, leading to the triggering of OBDII code B2793. Replacing the key fob battery is a simple first step to troubleshoot the problem.