AutoCodes – Lexus – B15CC Lexus

B15CC Lexus Code - Backup Battery Failure

Quick Answer

This Diagnostic Trouble Code (DTC) is set when the Data Communication Module (DCM) (Telematics Transceiver) detects one of the following: Open or short in the Back-Up Battery (BUB) circuit, The BUB voltage drops or the BUB malfunctions, The BUB temperature is (temporarily) high. Common causes include Faulty Back-Up Battery (BUB), Back-Up Battery (BUB) harness is open or shorted, Back-Up Battery (BUB) 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: B15CC Lexus indicates Backup Battery Failure.
Common causes: Common causes include Faulty Back-Up Battery (BUB), Back-Up Battery (BUB) harness is open or shorted, Back-Up Battery (BUB) 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 4,497

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on May 21, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
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Code B15CC Lexus Description

OBDII Code B15CC Lexus - Backup Battery Failure - AutoCodes.com — B15CC Lexus Code - Backup Battery Failure

What does this mean?

What are the Possible Causes of the DTC B15CC Lexus?

Faulty Back-Up Battery (BUB)
Back-Up Battery (BUB) harness is open or shorted
Back-Up Battery (BUB) circuit poor electrical connection
Faulty Data Communication Module (DCM) (Telematics Transceiver)

How to Fix the DTC B15CC 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 B15CC 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 B15CC Lexus 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 B15CC Lexus Code

1. What are the common symptoms of OBDII code B15CC (Backup Battery Failure) in a Lexus?

The common symptoms of B15CC include warning lights on the dashboard, issues with starting the vehicle, and problems with electronic systems like power windows and door locks.

2. What are the possible causes of OBDII code B15CC in a Lexus?

The code B15CC in a Lexus is typically caused by a failing backup battery, which is responsible for maintaining power to the vehicle's systems when the main battery is disconnected or replaced.

3. How can I diagnose OBDII code B15CC in my Lexus?

Diagnosing B15CC usually involves using an OBDII scanner to read the code and determine if it is related to a backup battery failure. Checking the voltage of the backup battery and its connections can also help identify the issue.

4. Can I repair OBDII code B15CC in my Lexus myself?

Repairing B15CC may require replacing the backup battery, which can often be done yourself if you have the necessary tools and knowledge. However, if you're unsure or uncomfortable with the task, it's best to seek professional help.

5. Is it safe to continue driving my Lexus with OBDII code B15CC?

While it may be safe to drive your Lexus with the B15CC code temporarily, it's important to address the issue promptly to prevent further damage to the vehicle's electronic systems.

6. How much does it cost to repair OBDII code B15CC in a Lexus?

The cost of repairing B15CC in a Lexus can vary depending on the extent of the issue and whether you choose to do the repair yourself or take it to a professional mechanic. Typically, replacing the backup battery is a relatively inexpensive repair.

7. Are there any preventive measures I can take to avoid OBDII code B15CC in my Lexus?

To prevent OBDII code B15CC, it's recommended to periodically check the condition of the backup battery and replace it as needed, especially if you're experiencing issues with warning lights or electronic systems in your Lexus.

8. Will resetting the OBDII code B15CC in my Lexus make it go away permanently?

Resetting the B15CC code may temporarily clear the warning lights, but if the underlying issue with the backup battery is not addressed, the code is likely to return. It's important to diagnose and repair the root cause of the problem.

9. Can a faulty backup battery cause other problems in my Lexus besides triggering the B15CC code?

Yes, a failing backup battery can cause other issues in your Lexus, such as erratic behavior of electronic systems, malfunctions in the vehicle's computer, and difficulties starting the engine.

10. How long does it take to repair OBDII code B15CC in a Lexus?

The repair time for B15CC in a Lexus can vary depending on the availability of parts and the complexity of the backup battery replacement. In most cases, the repair can be completed within a few hours.