my Tesla Model S Original (2012-2020) throws a C1001 code, what does it mean?

Learn how to diagnose and fix C1001 battery management system issues in Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, basic hand tools (screwdrivers, socket set).
• Ensure the vehicle is parked on a level surface and the power is turned off.

2. Inspect and Clean Battery Connections

• Sub-steps:
  1. Open the rear trunk to access the battery compartment.
  2. Disconnect the negative terminal of the battery to ensure safety.
  3. Inspect the positive and negative battery terminals for corrosion or damage.
  4. Clean any corrosion using a mixture of baking soda and water, and a wire brush if necessary.
  5. Reconnect the battery terminals securely, starting with the positive terminal followed by the negative.

3. Check Battery Voltage

• Sub-steps:
  1. Set the multimeter to the appropriate DC voltage range.
  2. Connect the multimeter probes to the battery terminals (red to positive, black to negative).
  3. Record the voltage reading; it should typically be between 12.5V and 13.5V for a healthy battery.
  4. If the voltage is low, consider charging the battery or replacing it if it fails to hold a charge.

4. Update Battery Management System (BMS)

• Sub-steps:
  1. Connect the vehicle to a Wi-Fi network.
  2. Access the vehicle’s software settings via the touchscreen display.
  3. Check for any available software updates related to the BMS and follow the prompts to install them.
  4. Restart the vehicle after the update process is complete.

5. Clear Error Codes

• Sub-steps:
  1. Use the OBD-II scanner to clear the C1001 code from the vehicle's memory.
  2. Take the vehicle for a short test drive to monitor for any reoccurrence of the code.
  3. Re-scan the vehicle after driving to confirm that the code does not return.