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U1728 Cadillac Code - Left Headlamp High Beam Control Module Lost Communication With Left Headlamp Leveling Actuator

- Code Popularity: 301 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC U1728 Cadillac?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Left Headlamp Leveling Actuator
  • Left Headlamp Leveling Actuator harness is open or shorted
  • Left Headlamp Leveling Actuator circuit poor electrical connection
  • Faulty Left Headlamp High Beam Control Module
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How to Fix the DTC U1728 Cadillac?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U1728 Cadillac code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

Code U1728 Cadillac 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 Left Headlamp High Beam Control Module from the Left Headlamp Leveling Actuator has not been received.

OBDII Code U1728 Cadillac - Left Headlamp High Beam Control Module Lost Communication With Left Headlamp Leveling Actuator - AutoCodes.com
U1728 Cadillac Code - Left Headlamp High Beam Control Module Lost Communication With Left Headlamp Leveling Actuator

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Code U1728 Cadillac comments

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