DPB_a264_WdhSwBistConCnt
Power braking assist reduced
What does the DPB_a264_WdhSwBistConCnt alert mean?
Dual Core SW-Bist comparison fault.
What you'll see in your Tesla
- Power braking assist reduced
- Braking may require increased effort
What triggers it
SW-BIST signatures of both cores are different. Signatures from SW-BIST routines will be calculated from Core 1 and Core 2 and compared if they are equal. Status of comparison is reported to watchdog handler by consumption counter interface.
When it clears
No internal issue is detected after changing operation cycle. If the condition persists, the DPB module may require replacement.
Potential impact
System will be running in fully degraded state. Braking may require increased effort. Hydraulic Boost Compensation will be triggered when driver pressed brake pedal.
Affected models
Track your Tesla's alerts automatically
Alerts like this reach MyTeslaMate through your car's Tesla telemetry API. MyTeslaMate logs every alert your Tesla reports and turns it into readable history and real-time notifications — hosted TeslaMate with no server to run.