EPBL-A303
EPBL_a303_clampingOccuredEarly
Also written as EPBL_A303 / EPBL A303 / EPBL_a303_clampingOccuredEarly / epbl_a303_clampingoccuredearly
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 EPBL-A303 mean?
Tesla alert code in the Electronic Parking Brake Left (EPBL) module. When EPB was applying the current measured went above the max no load current before piston position estimate predicted it would. The Electronic Parking Brake and Electronic Parking Brake Monitor took longer than expected to save caliper state in non-volatile memory. Caliper state saved to Electronic Parking Brake and Electronic Parking Brake Monitor mismatched for more than 500ms Electronic Parking Brake and Electronic Parking Brake Monitor states match Non-volatile memory error due to Electronic Parking Brake and Electronic Parking Brake Monitor mismatch One or more of the expected CAN messages from PTC were not received.
Original Description
When EPB was applying the current measured went above the max no load current before piston position estimate predicted it would. The Electronic Parking Brake and Electronic Parking Brake Monitor took longer than expected to save caliper state in non-volatile memory. Caliper state saved to Electronic Parking Brake and Electronic Parking Brake Monitor mismatched for more than 500ms Electronic Parking Brake and Electronic Parking Brake Monitor states match Non-volatile memory error due to Electronic Parking Brake and Electronic Parking Brake Monitor mismatch One or more of the expected CAN messages from PTC were not received.
Affected Tesla Models
What You May Notice
- Electronic Parking Brake Left alert: When EPB was applying the current measured went above the max no load current before piston position estimate predicted
- Parking brake may not engage or release normally
- Vehicle may not allow Autopilot or auto-hold features
How to Diagnose and Resolve
- 1 Manually engage the parking brake via the touchscreen before exiting
- 2 Reboot the vehicle and check if the alert clears
- 3 Schedule a Tesla Service appointment
- 4 Avoid parking on steep inclines until resolved
Severity Notes
EPBL-A303 is an Alert in the Electronic Parking Brake Left system. Confirm the vehicle screen and Tesla app show no driving or charging restrictions, and schedule service if the alert returns.