Engine-Codes - Cadillac - U1728 Cadillac

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

- Code Popularity: 302 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?

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 pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the U1728 Cadillac code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

What Does the U1728 Cadillac Code Mean?

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.

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

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