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

Learn how to diagnose and fix P0780 transmission issues in Tesla Outback (2020-2024). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery to prevent electrical shorts while working on the transmission.

2. Check and Replace Transmission Fluid

• Tools Required: Torque wrench, transmission fluid pump, fluid catch pan.
• Remove the transmission fluid pan by unscrewing the bolts using a socket set.
• Drain the old transmission fluid into the catch pan and inspect for metal shavings or debris.
• Clean the pan and replace the filter if necessary.
• Refill with the manufacturer-recommended transmission fluid to the proper level (refer to the owner's manual for specifications).
• Reinstall the fluid pan and torque the bolts to the manufacturer’s specifications.

3. Inspect and Test Shift Solenoids

• Tools Required: Multimeter, socket set.
• Remove the transmission cover to access the shift solenoids.
• Disconnect the electrical connectors from the solenoids and perform a resistance test using a multimeter.
• Replace any solenoids that show out-of-spec resistance readings.
• Reassemble the transmission cover and connectors.

4. Reprogram or Replace Transmission Control Module (TCM)

• Tools Required: OBD-II scanner, laptop with manufacturer software.
• Use the OBD-II scanner to check for any software updates available for the TCM.
• Follow the manufacturer’s instructions to reprogram the TCM if needed.
• If the TCM is faulty and cannot be reprogrammed, replace it with a new unit and reprogram as necessary.