my Tesla Model S Plaid/Refresh (2021-present) shows a B0001 code, what should I check?

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, torque wrench, and insulated gloves.
• Ensure safety by wearing insulated gloves and disconnecting the vehicle's high-voltage battery before starting work.

2. Inspect Battery Connections

• Step 1: Remove the underbody cover to access the battery pack.
• Step 2: Check all battery connectors for tightness and any signs of corrosion.
• Step 3: If corrosion is present, clean the connectors using a mixture of baking soda and water, then dry completely before reconnecting.

3. Test Battery Voltage

• Step 1: Reconnect the high-voltage battery and power on the vehicle.
• Step 2: Use a multimeter to measure the voltage at the battery terminals.
• Step 3: Compare the measured voltage to the specifications listed in the service manual. If the voltage is out of range, further inspection or replacement may be necessary.

4. Update Battery Management Software

• Step 1: Connect the vehicle to Wi-Fi and access the software update settings through the touchscreen.
• Step 2: Check for any available updates for the BMS and follow on-screen instructions to update.

5. Clear Diagnostic Codes

• Step 1: After completing the repairs and updates, use the OBD-II scanner to clear the B0001 code.
• Step 2: Monitor the system for a few days to ensure the code does not return.