how to address the P0780 transmission code in my Tesla Outback 6th Generation (2020-2024)?

Learn how to diagnose and fix P0780 transmission code in Tesla Outback 6th Generation. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the vehicle’s battery to ensure safety while working on electrical components.

2. Inspect and Replace Transmission Fluid

• Sub-steps:
  1. Raise the vehicle using a jack and secure it on jack stands.
  2. Remove the transmission fluid drain plug and allow the fluid to drain completely into a suitable container.
  3. Inspect the old fluid for debris or burning signs; replace if necessary.
  4. Reinstall the drain plug with a new gasket and torque to the manufacturer’s specifications.
  5. Refill the transmission with the correct type and quantity of fluid as specified in the owner’s manual.

3. Check and Repair Wiring/Connections

• Sub-steps:
  1. Visually inspect the wiring harness connected to the transmission for frays or damage.
  2. Clean or repair any corroded connectors.
  3. Ensure all connections are secure and free of dirt.

4. Test and Replace Transmission Solenoids (if needed)

• Sub-steps:
  1. Disconnect the electrical connector from the solenoid pack.
  2. Use a multimeter to check the resistance of each solenoid according to manufacturer specifications.
  3. If any solenoid is out of specification, remove it and replace with a new solenoid.
  4. Reconnect the electrical connectors once solenoids are replaced.

5. Reprogram or Replace TCM if necessary

• Sub-steps:
  1. If the TCM is suspected to be faulty, consult the manufacturer’s guidelines to reprogram it.
  2. If issues persist, remove the TCM and replace it with a new unit.
  3. Follow manufacturer instructions for programming the new TCM to ensure proper function.