VCFRONT-A172
VCFRONT_a172_wsteHtBlckdByMsmtch
Also written as VCFRONT_A172 / VCFRONT A172 / VCFRONT_a172_wsteHtBlckdByMsmtch / vcfront_a172_wstehtblckdbymsmtch
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-A172 mean?
Tesla alert code in the Vehicle Controller Front (VCFRONT) module. Waste Heat is not allowed because of a firmware mismatch. An ECU Mismatch is preventing waste heat. The Drive Inverter and Pedal Monitor will not be powered. Indicates there was a fault reported on an I2C bus.
Original Description
Waste Heat is not allowed because of a firmware mismatch. An ECU Mismatch is preventing waste heat. The Drive Inverter and Pedal Monitor will not be powered. Indicates there was a fault reported on an I2C bus.
Affected Tesla Models
What You May Notice
- Vehicle Controller Front alert: Waste Heat is not allowed because of a firmware mismatch. An ECU Mismatch is preventing waste heat. The Drive Inverter a
- 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-A172 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.