AutoCodes - Generic - U0252

U0252 Code - Lost Communication With Lighting Control Module Rear 'B'

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3
Table of contents

|U0252 code possible causes

  • Faulty Lighting Control Module Rear 'B'
  • Lighting Control Module Rear 'B' harness is open or shorted
  • Lighting Control Module Rear 'B' circuit poor electrical connection

|How do I fix the U0252 code?

Check 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.

|Cost of diagnosing the U0252 code

Labor: 1.0

The cost of diagnosing the U0252 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.

|What are U0252 code possible symptoms?

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

|U0252 code description

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Operating information and commands are exchanged among the devices. The devices have programmed information about what messages are needed to be exchanged on the serial data circuits. CAN bus uses two dedicated wires for communication. The wires are called CAN high and CAN low. When the CAN bus is in idle mode, both lines carry 2.5V. When data bits are being transmitted, the CAN high line goes to 3.75V, and the CAN low drops to 1.25V, thereby generating a 2.5V differential between the lines. Since communication relies on a voltage differential between the two bus lines, the CAN bus is NOT sensitive to inductive spikes, electrical fields, or other noise. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Lighting Control Module Rear 'B' has not been received.
OBDII Code U0252 - Lost Communication With Lighting Control Module Rear 'B' -

|Need more information with the U0252 code?

Need more information on how to fix the U0252 code? Get Access to Factory Service Manuals

|U0252 code information for specific makes

  • U0252 BUICK Lost Communication With Trailer Interface Control Module
  • U0252 CADILLAC Lost Communication With Trailer Interface Control Module
  • U0252 CHEVROLET Lost Communication With Trailer Interface Control Module
  • U0252 GMC Lost Communication With Trailer Interface Control Module

|Need help with a U0252 code?

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|U0252 code comments

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Repair Importance Level: 3
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