Engine-Codes - Chrysler - U11FB CHRYSLER

U11FB CHRYSLER - Lost Communication With Left Blind Spot Sensor

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

U11FB CHRYSLER Possible Causes

  • Faulty Left Blind Spot Sensor
  • Left Blind Spot Sensor harness is open or shorted
  • Left Blind Spot Sensor circuit poor electrical connection

How is the U11FB CHRYSLER code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What is the cost to diagnose the U11FB CHRYSLER code

Labor: 1.0

The cost to diagnose the U11FB CHRYSLER code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
How much do you know about cars?

Take the AutoCodes.com automotive tests and turbo-charge your car repair knowledge

Play Now

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)


The Blind Spot Monitor (BSM) system has two primary components; a Left Blind Spot Sensor (LBSS) and Right Blind Spot Sensor (RBSS). Each sensor includes an internal microprocessor that monitors and controls both the sensor and the blind spot indicator. The two sensors are concealed behind the outboard ends of the rear bumper fascia.
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.

More Information

Need more information on how to fix the U11FB CHRYSLER code?
Get Access to Factory Service Manuals

Need more help?

Get the U11fb Chrysler code diagnosed by a professional: Find a repair shop in your area