VCFRONT-A171
VCFRONT_a171_driveBlckdByMsmtch
Also written as VCFRONT_A171 / VCFRONT A171 / VCFRONT_a171_driveBlckdByMsmtch / vcfront_a171_driveblckdbymsmtch
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-A171 mean?
Tesla alert code in the Vehicle Controller Front (VCFRONT) module. Drive is not allowed because of a firmware mismatch. An ECU Mismatch is preventing drive. The car cannot get into the drive state. Drive has been requested without key authentication.
Original Description
Drive is not allowed because of a firmware mismatch. An ECU Mismatch is preventing drive. The car cannot get into the drive state. Drive has been requested without key authentication.
Affected Tesla Models
What You May Notice
- Vehicle Controller Front alert: Drive is not allowed because of a firmware mismatch. An ECU Mismatch is preventing drive. The car cannot get into the dr
- 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-A171 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.