B1268 Lexus Code - Back-Up Communication Bus Failure
Quick Answer
This Diagnostic Trouble Code (DTC) is output when +B (Battery) or GND (Ground) short occurs in the back-up communication bus. Common causes include Faulty Combination Switch, Combination Switch harness is open or shorted, Combination Switch 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
- B1268 Lexus indicates Back-Up Communication Bus Failure.
- Common causes
- Common causes include Faulty Combination Switch, Combination Switch harness is open or shorted, Combination Switch 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.
Code B1268 Lexus Description
What are the Possible Causes of the DTC B1268 Lexus?
- Faulty Combination Switch
- Combination Switch harness is open or shorted
- Combination Switch circuit poor electrical connection
How to Fix the DTC B1268 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 B1268 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 B1268 Lexus code?
Need more information on how to fix the B1268 Lexus code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B1268 Lexus code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about B1268 Lexus Code
1. What does the OBDII code B1268 indicate on a Lexus?
The code B1268 on a Lexus indicates a "Back-Up Communication Bus Failure," which means there is a fault in the backup communication network used for sending data between different control modules of the vehicle.
2. What symptoms might I notice if my Lexus has the B1268 code?
Symptoms of the B1268 code can include the malfunction indicator lamp (MIL) lighting up, various electrical systems malfunctioning such as navigation or audio systems, and potentially other warning lights on the dashboard.
3. What causes the B1268 code to appear on a Lexus?
Possible causes of the B1268 code include faulty wiring or connections in the communication bus, a defective control module, or issues with the bus configuration settings.
4. How can I fix the B1268 code in my Lexus?
Repairing the B1268 code typically involves inspecting and repairing any damaged wiring or connectors, replacing faulty control modules if necessary, and ensuring all bus configuration settings are correct. It's advisable to consult with a professional technician who has experience with automotive electronics.
5. Is it safe to drive my Lexus with the B1268 code?
While your vehicle may still operate, driving with the B1268 code can lead to unpredictable behavior of vehicle electronics and should be addressed as soon as possible to avoid potential safety issues.
6. How can a technician diagnose the B1268 code on a Lexus?
A technician will typically use a specialized diagnostic scanner to read the fault codes from the vehicle’s control modules. Further, they will inspect the communication bus wiring and connections, and test individual modules to isolate the problem.
7. Can ignoring the B1268 code lead to other problems in my Lexus?
Yes, ignoring the B1268 code can lead to more severe issues, such as additional system failures or complete loss of functionality in certain vehicle systems, further complicating diagnostics and repairs.
8. What tools are required to diagnose the B1268 code on a Lexus?
Diagnosing the B1268 code requires a professional-grade OBDII scanner capable of interfacing with Lexus's specific communication protocols, along with tools for testing wiring and electrical connectivity such as a multimeter.
9. How often do Lexus vehicles encounter the B1268 code?
The frequency of encountering the B1268 code is not very high but can occur especially in older models or those that have experienced significant electrical system interference or damage.
Discuss the causes and fixes for B1268 Lexus OBDII Code
Code B1268 Lexus comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
