VCLEFT-A338
VCLEFT_a338_trailerLightControllerMIA
Also written as VCLEFT_A338 / VCLEFT A338 / VCLEFT_a338_trailerLightControllerMIA / vcleft_a338_trailerlightcontrollermia
Why does the exact Tesla alert ID matter?
Record the exact alert ID, including underscores, suffixes, and companion alerts. Tesla alerts that look similar can point to different modules, timestamps, and service procedures.
What does VCLEFT-A338 mean?
Tesla alert code in the Vehicle Controller Left (VCLEFT) module. Trailer Light Controller is not communicating The trailer light controller is unplugged or has experienced an internal fault Trailer Light Controller is responding on LIN Trailer Light Controller is not functional
Original Description
Trailer Light Controller is not communicating The trailer light controller is unplugged or has experienced an internal fault Trailer Light Controller is responding on LIN Trailer Light Controller is not functional
Affected Tesla Models
What You May Notice
- Vehicle Controller Left alert: Trailer Light Controller is not communicating The trailer light controller is unplugged or has experienced an internal f
- Some features (climate, lights, or charging) may be temporarily unavailable
- Alert notification in the Tesla app
How to Diagnose and Resolve
- 1 Perform a soft reboot (hold both scroll wheels)
- 2 Check for pending OTA software updates in Controls > Software
- 3 If multiple features remain non-functional, schedule a service appointment
Severity Notes
VCLEFT-A338 is an Alert in the Vehicle Controller Left system. Confirm the vehicle screen and Tesla app show no driving or charging restrictions, and schedule service if the alert returns.