how to fix P0700 transmission error code in Toyota Tacoma N300 (2016-Present)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Park the vehicle on a flat surface and engage the parking brake.
• Disconnect the negative battery terminal to avoid electrical shorts.

2. Inspect and Replace Transmission Fluid

• Sub-steps:
  1. Locate the transmission fluid dipstick (if applicable) and remove it.
  2. Check the fluid level; if low, add the appropriate type of Toyota transmission fluid (typically Toyota WS).
  3. If the fluid is discolored, drain the transmission fluid using a drain pan.
  4. Replace the fluid filter if equipped, and refill the transmission with fresh fluid to the correct level.

3. Repair or Replace Transmission Control Module (if needed)

• Sub-steps:
  1. Locate the TCM, typically found near the transmission or under the dashboard.
  2. Disconnect the TCM connector and inspect for any signs of damage or corrosion.
  3. If necessary, remove the TCM using a socket set and replace it with a new unit.
  4. Reconnect the wiring harness firmly and ensure all connections are secure.

4. Clear Error Codes

• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Use the OBD-II scanner to clear any stored trouble codes from the vehicle’s memory.
  3. Start the vehicle and check for the check engine light to remain off.