AutoCodes – Lexus – B15C6 Lexus

B15C6 Lexus Code - Ignition Switch Signal Malfunction

Quick Answer

If vehicle movement (10 km/h (6 mph) or more for 10 seconds) is detected based on the location data sent from the Radio Receiver Assembly even when the Data Communication Module (DCM) (Telematics transceiver) detects that the ignition switch is off, this Diagnostic Trouble Code (DTC) will be stored. Common causes include Faulty Data Communication Module (DCM) (Telematics transceiver), DCM (Telematics transceiver) harness is open or shorted, DCM (Telematics transceiver) circuit poor electrical connection. 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
B15C6 Lexus indicates Ignition Switch Signal Malfunction.
Common causes
Common causes include Faulty Data Communication Module (DCM) (Telematics transceiver), DCM (Telematics transceiver) harness is open or shorted, DCM (Telematics transceiver) circuit poor electrical connection.
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 904
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on May 21, 2019
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Code B15C6 Lexus Description

If vehicle movement (10 km/h (6 mph) or more for 10 seconds) is detected based on the location data sent from the Radio Receiver Assembly even when the Data Communication Module (DCM) (Telematics transceiver) detects that the ignition switch is off, this Diagnostic Trouble Code (DTC) will be stored.
OBDII Code B15C6 Lexus - Ignition Switch Signal Malfunction - AutoCodes.com
B15C6 Lexus Code - Ignition Switch Signal Malfunction

What are the Possible Causes of the DTC B15C6 Lexus?

  • Faulty Data Communication Module (DCM) (Telematics transceiver)
  • DCM (Telematics transceiver) harness is open or shorted
  • DCM (Telematics transceiver) circuit poor electrical connection

How to Fix the DTC B15C6 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 B15C6 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 B15C6 Lexus code?

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Need Help with the Code?

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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 B15C6 Lexus Code

1. What are the common symptoms of OBDII code B15C6 in a Lexus related to Ignition Switch Signal Malfunction?

The common symptoms include difficulty starting the vehicle, intermittent power loss, and issues with the key not being recognized.

2. What are the possible causes of the Ignition Switch Signal Malfunction code B15C6 in a Lexus?

Potential causes include a faulty ignition switch, damaged wiring or connectors, a defective key fob, or a malfunctioning security module.

3. How can I diagnose the Ignition Switch Signal Malfunction code B15C6 in my Lexus?

Diagnosis typically involves using a professional OBDII scanner to read the code, testing the ignition switch and related components, and inspecting the wiring for any visible damage.

4. Can I continue driving my Lexus with the B15C6 code indicating Ignition Switch Signal Malfunction?

It is not recommended to continue driving the vehicle with this code present, as it can lead to further electrical issues and potential safety hazards.

5. How can I reset the B15C6 code for Ignition Switch Signal Malfunction in my Lexus?

Resetting the code can be done using an OBDII scanner, but it is important to address the underlying issue causing the code to prevent it from reoccurring.

6. Is it possible to fix the B15C6 code related to Ignition Switch Signal Malfunction in my Lexus on my own?

While some DIY enthusiasts may attempt to address the issue themselves, it is recommended to have a professional mechanic diagnose and repair the problem to ensure proper resolution.

7. What are some repair tips for resolving the Ignition Switch Signal Malfunction code B15C6 in a Lexus?

Repair tips may include checking and cleaning the key fob contacts, inspecting and repairing damaged wiring, and replacing the ignition switch if necessary.

8. How much does it typically cost to repair the B15C6 code for Ignition Switch Signal Malfunction in a Lexus?

The cost of repair can vary depending on the underlying issue, but it may range from a few hundred dollars for simple fixes to over a thousand dollars for more complex issues.

9. Will fixing the B15C6 code related to Ignition Switch Signal Malfunction improve the overall performance of my Lexus?

Addressing the code promptly can help prevent further electrical problems and ensure the proper functioning of the ignition system, ultimately improving the vehicle's performance and reliability.

10. Are there any preventive measures I can take to avoid encountering the B15C6 code in my Lexus in the future?

Regular maintenance, such as checking the key fob battery, keeping the ignition switch clean, and addressing any electrical issues promptly, can help prevent the recurrence of the Ignition Switch Signal Malfunction code B15C6 in your Lexus.

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