Engine-Codes - Generic - U1726

U1726 - Right Headlamp High Beam Control Module Lost Communication With Right Headlamp Low Beam Control Module

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

U1726 Possible Causes

  • Faulty Right Headlamp Low Beam Control Module
  • Right Headlamp Low Beam Control Module harness is open or shorted
  • Right Headlamp Low Beam Control Module circuit poor electrical connection
  • Faulty Right Headlamp High Beam Control Module

How is the U1726 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 U1726 code

Labor: 1.0

The cost to diagnose the U1726 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.
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Possible Symptoms

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

U1726 Meaning

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 Right Headlamp High Beam Control Module from the Right Headlamp Low Beam Control Module has not been received.

More Information

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Information for specific makes

  • U1726 BUICK Right Headlamp High Beam Control Module Lost Communication With Right Headlamp Low Beam Control Module
  • U1726 CADILLAC Right Headlamp High Beam Control Module Lost Communication With Right Headlamp Low Beam Control Module
  • U1726 CHEVROLET Right Headlamp High Beam Control Module Lost Communication With Right Headlamp Low Beam Control Module
  • U1726 GMC Right Headlamp High Beam Control Module Lost Communication With Right Headlamp Low Beam Control Module

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