Engine-Codes - Buick - U172A Buick

U172A Buick Code - Left High Beam Control Module Lost Communication With Left Headlamp Horizontal Motor

- Code Popularity: 381 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC U172A Buick?

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 Horizontal Motor
  • Left Headlamp Horizontal Motor harness is open or shorted
  • Left Headlamp Horizontal Motor circuit poor electrical connection
  • Faulty Left High Beam Control Module
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How to Fix the DTC U172A Buick?

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 U172A Buick 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 U172A Buick 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 High Beam Control Module from the Left Headlamp Horizontal Motor has not been received.

U172A Buick Code - Left High Beam Control Module Lost Communication With Left Headlamp Horizontal Motor

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