VCFRONT-A355
VCFRONT_a355_coolantSysLockout
Also written as VCFRONT_A355 / VCFRONT A355 / VCFRONT_a355_coolantSysLockout / vcfront_a355_coolantsyslockout
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 VCFRONT-A355 mean?
Tesla alert code in the Vehicle Controller Front (VCFRONT) module. The coolant system is will not operate (pumps off) when the vehicle is not factory gated and the coolant system has not been filled. The vehicle is not factory gated and the coolant is not filled or the fill/drain routine is active. Coolant is filled or vehicle is factory gated, and fill/drain routine is inactive. Powertrain performance will be limited, as pumps will be turned off and the coolant valve will be set in series/no bypass mode.
Original Description
The coolant system is will not operate (pumps off) when the vehicle is not factory gated and the coolant system has not been filled. The vehicle is not factory gated and the coolant is not filled or the fill/drain routine is active. Coolant is filled or vehicle is factory gated, and fill/drain routine is inactive. Powertrain performance will be limited, as pumps will be turned off and the coolant valve will be set in series/no bypass mode.
Affected Tesla Models
What You May Notice
- Vehicle Controller Front alert: The coolant system is will not operate (pumps off) when the vehicle is not factory gated and the coolant system has not
- 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
VCFRONT-A355 is an Alert in the Vehicle Controller Front system. Confirm the vehicle screen and Tesla app show no driving or charging restrictions, and schedule service if the alert returns.