how to fix P0700 transmission code in Toyota Highlander Fourth Generation (2020-present)

Solution

1. Preparation

• Gather required tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.
• Raise the vehicle securely on jack stands.

2. Check Transmission Fluid

• Locate the transmission dipstick or fill plug.
• Remove the dipstick and check the fluid level; add fluid if low.
• Inspect fluid for burnt smell or discoloration; replace if necessary.

3. Inspect Wiring and Connectors

• Visually inspect the wiring harness connected to the TCM and the transmission.
• Repair or replace any damaged or corroded connectors.
• Ensure all connections are secure.

4. Reset TCM

• Reconnect the battery after completing inspection and repairs.
• Use the OBD-II scanner to clear the P0700 code and any other related codes.

5. Road Test

• Drive the vehicle to check for any recurrence of symptoms.
• Monitor transmission performance during the test drive.