Left High Beam Control Module Lost Communication With Left Headlamp Horizontal Motor
Table of contents
U172A CADILLAC Possible 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
How do I fix code U172A 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’s pins.
Cost of diagnosing the U172A CADILLAC code
The cost of diagnosing the U172A CADILLAC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
U172A 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 High Beam Control Module from the Left Headlamp Horizontal Motor has not been received.