AutoCodes - Chevrolet - U1556 CHEVROLET

U1556 CHEVROLET Code - Chassis Control Module Lost Communication With Trailer Brake Power Control Module On LIN Bus

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

|U1556 CHEVROLET code possible causes

  • Faulty Trailer Brake Power Control Module
  • Trailer Brake Power Control Module harness is open or shorted
  • Trailer Brake Power Control Module circuit poor electrical connection
  • Faulty Chassis Control Module

|How do I fix the U1556 CHEVROLET 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 U1556 CHEVROLET code

Labor: 1.0

The cost of diagnosing the U1556 CHEVROLET 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 U1556 CHEVROLET code possible symptoms?

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

|U1556 CHEVROLET code description

The Local Interconnect Network (LIN) Bus consists of a single wire with a transmission rate of 10.417 Kbit/s. The serial data is transmitted over a LIN circuit between a master control module and other LIN devices within a particular subsystem. If serial data communication is lost between any of the LIN devices on the LIN bus network, the master control module will set a no communication code against the non-communicating LIN device. The Diagnostic Trouble Code (DTC) will set when a supervised periodic message to the Chassis Control Module from the Trailer Brake Power Control Module has not been received.
OBDII Code U1556 Chevrolet - Chassis Control Module Lost Communication With Trailer Brake Power Control Module On LIN Bus - AutoCodes.com

|Need more information with the U1556 CHEVROLET code?

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|U1556 CHEVROLET code comments

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