how to fix Honda Civic 10th Generation (2016-2021) P0700 transmission code

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Raise the vehicle and support it securely with jack stands.

2. Inspect and Replace Transmission Fluid

• Sub-steps:
  1. Remove the transmission drain plug and allow the fluid to drain into a container.
  2. Replace the drain plug and tighten it to the manufacturer's torque specifications (typically around 29 lb-ft).
  3. Refill the transmission with the correct type of fluid (Honda ATF DW-1) using a funnel, ensuring the fluid is at the proper level.

3. Check and Repair Wiring and Connectors

• Sub-steps:
  1. Visually inspect the wiring harness and connectors leading to the TCM and transmission solenoids.
  2. Clean any corrosion using electrical contact cleaner.
  3. Repair or replace any damaged wires or connectors as necessary.

4. Test and Replace Transmission Control Module (if necessary)

• Sub-steps:
  1. Reconnect the battery terminal and start the vehicle.
  2. Use the scanner to check for any fault codes related to the TCM.
  3. If codes persist, remove the TCM by unscrewing the mounting bolts and disconnecting the harness.
  4. Install the new TCM by reversing the removal process and ensuring all connections are secure.

5. Inspect and Replace Transmission Solenoids (if necessary)

• Sub-steps:
  1. Remove the transmission pan by unscrewing the bolts and gently prying it off.
  2. Inspect the solenoids and replace any that are faulty by disconnecting the electrical connectors and removing the solenoid bolts.
  3. Install new solenoids and replace the transmission pan with a new gasket, tightening the bolts to the specified torque (usually around 10 lb-ft).