U11FB RAM Code - Lost Communication With Left Blind Spot Sensor
Quick Answer
The Blind Spot Monitor (BSM) system has two primary components; a Left Blind Spot Sensor (LBSS) and Right Blind Spot Sensor (RBSS). Common causes include Faulty Left Blind Spot Sensor, Left Blind Spot Sensor harness is open or shorted, Left Blind Spot Sensor 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
- U11FB RAM indicates Lost Communication With Left Blind Spot Sensor.
- Common causes
- Common causes include Faulty Left Blind Spot Sensor, Left Blind Spot Sensor harness is open or shorted, Left Blind Spot Sensor 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 U11FB RAM Description
The microprocessor analyzes the sensor data to determine whether any detected objects should be reported. When it is determined that an object should be reported, the Sensor controls its respective left or right BSM display directly through a hard wired output to the Outside Rearview Mirrors. The sensor also sends an electronic request message over the CAN Bus to the radio. The Radio then mutes any current output through the speakers and generates a chime as an audible alert.
Each sensor performs a bulb test by illuminating the triangle icon in the Outside Rearview Mirror at each ignition ON cycle.
The Diagnostic Trouble Code (DTC) sets when no BUS messages from the Left Blind Spot Sensor (LBSS) are received for greater than 1.05 seconds.
What are the Possible Causes of the DTC U11FB RAM?
- Faulty Left Blind Spot Sensor
- Left Blind Spot Sensor harness is open or shorted
- Left Blind Spot Sensor circuit poor electrical connection
How to Fix the DTC U11FB RAM?
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 U11FB RAM 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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Frequently Asked Questions about U11FB RAM Code
1. What are the common symptoms of OBDII code U11FB RAM "Lost Communication With Left Blind Spot Sensor"?
- Common symptoms include the malfunction indicator light (MIL) illuminated on the dashboard, loss of blind spot monitoring system functionality, and potential error messages related to the left blind spot sensor.
2. What are the possible causes of OBDII code U11FB RAM?
- The code U11FB RAM is typically triggered by issues such as a faulty left blind spot sensor, damaged wiring or connectors, a malfunctioning control module, or software communication errors.
3. How can I diagnose the cause of OBDII code U11FB RAM?
- Diagnosis involves checking the wiring and connectors leading to the left blind spot sensor, testing the sensor itself for proper functionality, and using a diagnostic scan tool to communicate with the control module to identify communication faults.
4. Is it safe to drive with OBDII code U11FB RAM active?
- While the vehicle should remain operational, it is recommended to address the issue promptly to ensure the proper functioning of the blind spot monitoring system, which enhances safety while driving.
5. Can I reset OBDII code U11FB RAM on my own?
- Resetting the code may temporarily clear the fault, but it will likely return if the underlying issue is not resolved. It is advisable to diagnose and repair the root cause of the communication loss with the left blind spot sensor.
6. How can I repair OBDII code U11FB RAM "Lost Communication With Left Blind Spot Sensor"?
- Repairing the code involves fixing or replacing the faulty left blind spot sensor, repairing damaged wiring or connectors, addressing issues with the control module, and ensuring proper communication between components.
7. Are there any DIY tips for troubleshooting OBDII code U11FB RAM?
- DIY troubleshooting tips include visually inspecting wiring and connectors for damage, checking sensor connections for corrosion or loose fittings, and ensuring all related components are securely in place.
8. How much does it cost to repair OBDII code U11FB RAM?
- The cost of repair can vary depending on the specific issue causing the communication loss with the left blind spot sensor. Costs may include sensor replacement, wiring repairs, labor charges, and diagnostic fees.
9. Can extreme weather conditions affect OBDII code U11FB RAM?
- Extreme weather conditions, such as exposure to moisture, heat, or cold, can potentially damage the wiring or sensor components involved in the blind spot monitoring system, leading to communication errors and triggering the code U11FB RAM.
10. Will fixing OBDII code U11FB RAM require a visit to a dealership or can it be done by an independent mechanic?
- The repair for OBDII code U11FB RAM can typically be performed by an independent mechanic familiar with automotive diagnostics and sensor systems. However, a dealership may also be equipped to handle the repair.
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