how to fix P0700 transmission code in Toyota Highlander XU70 (2020-Present)

Solution

1. Preparation

• Gather tools and parts required.
• Ensure the vehicle is parked on a level surface and securely supported with jack stands.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Transmission Fluid

• Tools Required: Socket set, fluid pump, transmission fluid catch pan.
• Sub-steps:
  1. Remove the transmission fluid pan using the socket set.
  2. Allow the old fluid to completely drain into the catch pan.
  3. Inspect the old fluid for metal shavings or burnt smell.
  4. Replace with new transmission fluid as specified by the manufacturer (check the owner's manual for fluid type).
  5. Reinstall the pan and torque the bolts to the manufacturer's specifications.

3. Replace Transmission Filter (if applicable)

• Tools Required: Socket set, new transmission filter.
• Sub-steps:
  1. Access the transmission filter by removing the fluid pan (if not already removed).
  2. Remove the old filter; ensure no debris falls into the transmission.
  3. Install the new filter, ensuring it is seated properly.
  4. Reinstall the fluid pan.

4. Clear Fault Codes

• Tools Required: OBD-II scanner.
• Sub-steps:
  1. Reconnect the battery.
  2. Use the OBD-II scanner to clear the P0700 code from the vehicle's computer.
  3. Turn the ignition on without starting the engine to check for any persistent codes.

5. Reassemble and Test Drive

• Sub-steps:
  1. Lower the vehicle from jack stands.
  2. Start the engine and allow it to reach operating temperature.
  3. Check the transmission fluid level and add fluid if necessary.
  4. Test drive the vehicle to ensure proper shifting and operation.