Battery Management System Power Supply Voltage Out of Range
The TESLA-BMS_W061 (Tesla Battery Management System (BMS)) EV fault code means: Battery Management System Power Supply Voltage Out of Range. This is a serious severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- expert
- Estimated cost
- Often resolved by a 12V low-voltage battery replacement (~$85-$300+); a BMS power-feed or module fault is diagnosed and quoted by Tesla service.
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Common Symptoms
- Alert that the battery management system has a power-supply issue
- May warn that the car needs service and possibly may not restart
- Can appear together with 12V low-voltage battery alerts
- Possible reduced functionality depending on the underlying condition
Probable Causes (Ranked by Likelihood)
- The power supply feeding the BMS is out of its acceptable voltage range, frequently tied to a weak or failing 12V low-voltage battery Likely
- Wiring, connector, or power-feed fault to the BMS Possible
- An internal BMS power-supply fault Possible
Step-by-Step Diagnostic Procedure
Per Tesla, the BMS is operating at an out-of-bounds supply voltage. Because the 12V system powers the BMS, start by checking the health of the 12V low-voltage battery and its connections.
Look for companion VCFRONT 12V alerts -- resolving a degraded 12V battery often clears this code.
If the 12V system checks out, the BMS power feed or the module itself needs Tesla service diagnosis.
Frequently Asked Questions
What does BMS_w061 mean on a Tesla?
It means the battery management system is receiving an out-of-range supply voltage. Since the 12V low-voltage system powers the BMS, the most common root cause is a weak or failing 12V battery or its wiring rather than the high-voltage pack itself.
Is BMS_w061 safe to drive with?
Have it checked promptly. Tesla may warn the car needs service and could fail to restart. Start with the 12V battery, which is the usual culprit.
Sources
This page is built from documented references. Verify against your own service info before repair work.