TESLA Chassis

Tesla EPB Alert Codes

Electronic Parking Brake reference page with 25 Tesla alert codes, 18 detailed descriptions, severity counts, and diagnostic context.

Critical

Warning

Caution

Info

What the EPB system covers

Electronic Parking Brake alerts belong to Tesla's proprietary diagnostic alert system and are grouped under the chassis category.

Read all active alerts together instead of diagnosing a single code in isolation.

Check recent service, firmware updates, and low-voltage battery condition.

Use Tesla Service or a qualified EV technician for safety-critical systems.

Alert type breakdown

Warning 17 Unknown 6 Fault 2

Tesla EPB code list

Rows with a linked code have a dedicated detail page.

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Code	Severity	Type	Description
EPB_f123 EPB_f123_releaseDistanceL	Critical	Fault	EPB_f123 - release Distance L Tesla fault code in the Electronic Parking Brake (EPB) module related to release distance l.
EPB_f124 EPB_f124_releaseDistanceR	Critical	Fault	EPB_f124 - release Distance R Tesla fault code in the Electronic Parking Brake (EPB) module related to release distance r.
EPB_1_1 EPB_1_1	Info	Unknown	EPB_1_1 - 1 1 Tesla unknown code in the Electronic Parking Brake (EPB) module. Electronic Parking Brake did not release, it will retry a release and enter fault if retry fails Debug information for 1ms task errors. Vehicle speed is limited based on ultrasonic distance measurements. Currently in ghosted alert. Customer facing alert for Electronic Parking Brake issues which occur when caliper is not moving
EPB_u003 EPB_u003_dynamicBrakeApplied	Info	Unknown	EPB_u003 - dynamic Brake Applied Tesla unknown code in the Electronic Parking Brake (EPB) module. This alert indicates the electronic parking brake (EPB) has been applied while the vehicle is in motion.
EPB_u004 EPB_u004_pressFootBrake	Info	Unknown	EPB_u004 - press Foot Brake Tesla unknown code in the Electronic Parking Brake (EPB) module. This alert indicates that the brake pedal must be pressed to release parking brake.
EPB_u008 EPB_u008_turnOnCarToPark	Info	Unknown	EPB_u008 - turn On Car To Park Tesla unknown code in the Electronic Parking Brake (EPB) module related to turn on car to park.
EPB_u009 EPB_u009_towModeEnabled	Info	Unknown	EPB_u009 - tow Mode Enabled Tesla unknown code in the Electronic Parking Brake (EPB) module. The electronic parking brake (EPB) has not been applied.
EPB_u010 EPB_u010_serviceModeEnabled	Info	Unknown	EPB_u010 - service Mode Enabled Tesla unknown code in the Electronic Parking Brake (EPB) module. Parking brake service mode is enabled, which will prevent the electronic parking brake (EPB) from being applied. If this alert is present, the vehicle will likely remain free rolling.
EPB_w016 EPB_w016_leftPHalfBridge	Warning	Warning	EPB_w016 - left P Half Bridge Tesla warning code in the Electronic Parking Brake (EPB) module. The half bridge diagnostic fault line latches for more than 10ms on the positive lead of the left motor. This alert indicates an over-temperature condition from the left positive half bridge. This alert is expected when the vehicle is parked on very high slopes. If this is the case, no further action is required. However, if this alert is seen while parking on normal slopes, this likely indicates a problem with the electronic control unit (ECU).
EPB_w017 EPB_w017_leftNHalfBridge	Warning	Warning	EPB_w017 - left N Half Bridge Tesla warning code in the Electronic Parking Brake (EPB) module. The half bridge diagnostic fault line latches for more than 10ms on the negative lead of the left motor.
EPB_w024 EPB_w024_motorShortedReleaseL	Warning	Warning	EPB_w024 - motor Shorted Release L Tesla warning code in the Electronic Parking Brake (EPB) module related to motor shorted release l.
EPB_w025 EPB_w025_motorShortedApplyL	Warning	Warning	EPB_w025 - motor Shorted Apply L Tesla warning code in the Electronic Parking Brake (EPB) module. The Electric Parking Brake (EPB) has detected a motor short while attempting to apply the caliper.
EPB_w050 EPB_w050_resetRequired	Warning	Warning	EPB_w050 - reset Required Tesla warning code in the Electronic Parking Brake (EPB) module. The Electronic Parking Brake (EPB) is not able to detect the location of the parking brake calipers relative to the rotor, and the state may be reported as Signal Not Available (SNA). If this alert is present, the EPB may be requesting the user to reset the EPB by applying the brakes.
EPB_w051 EPB_w051_epbNotApplied	Warning	Warning	EPB_w051 - epb Not Applied Tesla warning code in the Electronic Parking Brake (EPB) module. The electronic parking brake (EPB) failed to apply on at least one side.
EPB_w052 EPB_w052_epbProblem	Warning	Warning	EPB_w052 - epb Problem Tesla warning code in the Electronic Parking Brake (EPB) module. A brake fault was detected while idle (e.g. open or shorted motor leads). It may not be possible to park or release the brake.
EPB_w053 EPB_w053_epbNotReleased	Warning	Warning	EPB_w053 - epb Not Released Tesla warning code in the Electronic Parking Brake (EPB) module. This alert indicates the electronic parking brake (EPB) failed to release on at least one side.
EPB_w080 EPB_w080_rightPHalfBridge	Warning	Warning	EPB_w080 - right P Half Bridge Tesla warning code in the Electronic Parking Brake (EPB) module. A positive half bridge over-temperature fault shall be asserted when the half bridge diagnostic fault line latches for more than 10ms on the positive lead of the right motor.
EPB_w081 EPB_w081_rightNHalfBridge	Warning	Warning	EPB_w081 - right N Half Bridge Tesla warning code in the Electronic Parking Brake (EPB) module. A negative half bridge over-temperature fault shall be asserted when the half bridge diagnostic fault line latches for more than 10ms on the negative lead of the right motor.
EPB_w088 EPB_w088_motorShortedReleaseR	Warning	Warning	EPB_w088 - motor Shorted Release R Tesla warning code in the Electronic Parking Brake (EPB) module related to motor shorted release r.
EPB_w089 EPB_w089_motorShortedApplyR	Warning	Warning	EPB_w089 - motor Shorted Apply R Tesla warning code in the Electronic Parking Brake (EPB) module. The Electronic Parking Brake (EPB) has detected a motor short while attempting to apply the caliper.
EPB_w095 EPB_w095_invalidConfig	Warning	Warning	EPB_w095 - invalid Config Tesla warning code in the Electronic Parking Brake (EPB) module. The electronic parking brake (EPB) has detected that there is an invalid configuration present.
EPB_w100 EPB_w100_calibrationWarning	Warning	Warning	EPB_w100 - calibration Warning Tesla warning code in the Electronic Parking Brake (EPB) module related to calibration warning.
EPB_w123 EPB_w123_releaseDistanceL	Warning	Warning	EPB_w123 - release Distance L Tesla warning code in the Electronic Parking Brake (EPB) module. The left parking brake motor is unable to reach the expected release counts.
EPB_w124 EPB_w124_releaseDistanceR	Warning	Warning	EPB_w124 - release Distance R Tesla warning code in the Electronic Parking Brake (EPB) module. The right parking brake motor is unable to reach the expected release counts.
EPB_w125 EPB_w125_gradeTooSteep	Warning	Warning	EPB_w125 - grade Too Steep Tesla warning code in the Electronic Parking Brake (EPB) module related to grade too steep.