how to solve the P0868 code in my Tesla Model S Original (2012-2020)

Learn how to diagnose and fix P0868 transmission fluid pressure issues in Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the vehicle's battery to prevent electrical shorts.

2. Check and Replace Transmission Fluid

• Sub-steps:
  1. Remove the transmission fluid drain plug using a socket set.
  2. Allow the old fluid to fully drain into a suitable container.
  3. Inspect the drain plug for metal shavings; clean it if necessary.
  4. Replace the drain plug and torque it to the manufacturer's specifications (check the service manual for exact torque value).
  5. Refill the transmission with the correct type of transmission fluid (refer to Tesla specifications).

3. Inspect and Test Transmission Pressure

• Sub-steps:
  1. Connect a transmission pressure gauge to the designated test port.
  2. Start the vehicle and monitor the pressure while shifting through the gears.
  3. If the pressure is below specifications, further inspection of the pump or valve body may be needed.

4. Repair or Replace Affected Components

• Sub-steps:
  1. If the transmission pressure is low, inspect the oil pump. Replace if necessary.
  2. Check the TCM for faults. If it shows signs of failure, consider reprogramming or replacement.
  3. Reconnect the battery and clear the error codes using the OBD-II scanner.