TESLA Network

Tesla BC Alert Codes

BC reference page with 2 Tesla alert codes, 2 detailed descriptions, severity counts, and diagnostic context.

Critical

Warning

Caution

Info

What the BC system covers

BC alerts belong to Tesla's proprietary diagnostic alert system and are grouped under the network 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.

Warning 2

Rows with a linked code have a dedicated detail page.

Code	Severity	Type	Description
BC_w001 BC_w001_leftIndicatorFail	Warning	Warning	BC_w001 - left Indicator Fail Tesla warning code in the BC (BC) module. The left indicator is not functioning as expected and may be flashing faster than normal. If a fault (open, short, over-current..etc) is detected on any of the driven lamp outputs required for signaling (which will be different for each vehicle region), then the frequency of the flashing signal sent by the BCM to the turn signals is intentionally doubled in speed to indicate an issue. The vehicle can only determine if the issue is for the left or right indicator. It cannot determine if the issue is in the front or rear indicator, so they both must be checked.
BC_w002 BC_w002_rightIndicatorFail	Warning	Warning	BC_w002 - right Indicator Fail Tesla warning code in the BC (BC) module. The right indicator is not functioning as expected and may be flashing faster than normal. If a fault (open, short, over-current..etc) is detected on any of the driven lamp outputs required for signaling (which will be different for each vehicle region), then the frequency of the flashing signal sent by the BCM to the turn signals is intentionally doubled in speed to indicate an issue. The vehicle can only determine if the issue is for the left or right indicator. It cannot determine if the issue is in the front or rear indicator, so they both must be checked.