AutoCodes – Lexus – B2606 Lexus

B2606 Lexus Code - Key Code Confirm Signal Malfunction

Quick Answer

A key code confirmation signal (ON or OFF) is sent from the main Body ECU to the Multiplex Tilt and Telescopic ECU via the communication bus. Common causes include Faulty Smart access system with push-button start (for start function), Faulty Multiplex Tilt and Telescopic ECU. 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: B2606 Lexus indicates Key Code Confirm Signal Malfunction.
Common causes: Common causes include Faulty Smart access system with push-button start (for start function), Faulty Multiplex Tilt and Telescopic ECU.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 2,276

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 07, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B2606 Lexus Description

A key code confirmation signal (ON or OFF) is sent from the main Body ECU to the Multiplex Tilt and Telescopic ECU via the communication bus. The multiplex tilt and telescopic ECU uses this signal to operate the auto away/return function. The Diagnostic Trouble Code (DTC) sets when the IG signals and/or key code confirmation signals are not received correctly.

OBDII Code B2606 Lexus - Key Code Confirm Signal Malfunction - AutoCodes.com — B2606 Lexus Code - Key Code Confirm Signal Malfunction

What does this mean?

What are the Possible Causes of the DTC B2606 Lexus?

Faulty Smart access system with push-button start (for start function)
Faulty Multiplex Tilt and Telescopic ECU

How to Fix the DTC B2606 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 B2606 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.

Need more information about the B2606 Lexus code?

Need more information on how to fix the B2606 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2606 Lexus code diagnosed by a professional: Find a repair shop in your area

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 B2606 Lexus Code

1. What are the common symptoms of OBDII code B2606 in a Lexus related to Key Code Confirm Signal Malfunction?

The common symptoms include difficulty starting the vehicle, issues with the key fob recognition system, and the immobilizer system being disabled.

2. What are the possible causes of OBDII code B2606 in a Lexus?

The code B2606 typically indicates a problem with the key code confirm signal, which could be caused by a faulty key fob, a problem with the immobilizer system, or issues with the key code receiver.

3. How can I diagnose the OBDII code B2606 in my Lexus?

Diagnosing code B2606 usually involves checking the key fob battery, ensuring the key fob is functioning properly, and inspecting the key code receiver and related wiring for any damage or loose connections.

4. Can a DIYer repair OBDII code B2606 in a Lexus?

DIY repairs for code B2606 may include replacing the key fob battery, reprogramming the key fob, or checking and repairing any damaged wiring connections. However, more complex issues may require professional diagnosis and repair.

5. How important is it to address OBDII code B2606 in a Lexus promptly?

It is important to address code B2606 promptly as it can affect the security and functionality of the vehicle's immobilizer system, potentially leading to starting issues or unauthorized access to the vehicle.

6. Are there any preventive measures to avoid OBDII code B2606 in a Lexus?

To prevent code B2606, regularly check the key fob battery for proper functioning, avoid dropping or damaging the key fob, and ensure any aftermarket modifications to the key system are compatible with the vehicle.

7. Can a faulty key fob cause OBDII code B2606 in a Lexus?

Yes, a faulty key fob can cause code B2606 as it may fail to send the correct signal to the key code receiver, leading to a malfunction in the key code confirm signal.

8. How much does it typically cost to repair OBDII code B2606 in a Lexus at a dealership or repair shop?

The cost of repairing code B2606 can vary depending on the exact cause of the issue, but it may range from a simple key fob battery replacement to more complex repairs involving the immobilizer system. Costs can range from $50 to $500 or more.

9. Is it safe to continue driving with OBDII code B2606 in a Lexus?

It is generally not recommended to drive with code B2606 present, as it can impact the security of the vehicle's immobilizer system and potentially lead to starting issues or unauthorized access. It is best to address the issue promptly.

10. Can resetting the ECU clear OBDII code B2606 in a Lexus?

Resetting the ECU may temporarily clear the code, but if the underlying issue with the key code confirm signal malfunction is not addressed, the code is likely to reappear. It is important to diagnose and repair the root cause of the problem.