The Left Headlight Control Module (HCML) detects an internal condition affecting the functionality of the left headlight, which is reported to the front vehicle controller (VCFRONT).
<0.01% (Extremely rare)
None displayed
Some headlight functions may be unavailable or may not function as expected. Headlight functionality may return after vehicle sleep.
The Left Headlight Control Module (HCML) detects an internal condition affecting the functionality of the left headlight, which is reported to the front vehicle controller (VCFRONT).
The pixel matrix manager detects non-functional pixels or has communication issues, or the voltage measured across the boost rail, Lowbeam, DRL, Side Marker, or Turn LEDs is out of range, or the LED drivers in the ECU have reported status flags, or certain values programmed in the matrix manager EEPROM are out of range.
Clears when the HCML is power cycled, which occurs during vehicle sleep.
Model Y 2025+
service
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