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

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Shift the vehicle into park and apply the parking brake.

2. Inspect and Replace Transmission Fluid

1. Locate the transmission fluid dipstick (if equipped) or the fill plug.
2. Remove the dipstick or fill plug and check the fluid level.
3. If the fluid is low, add the recommended type of transmission fluid (Honda ATF DW-1).
4. If the fluid appears dirty or burnt, drain the transmission fluid:
   • Place a drain pan under the transmission.
   • Remove the transmission pan bolts and the pan.
   • Allow the old fluid to drain completely.
   • Clean the pan and replace the filter if necessary.
   • Reinstall the pan with a new gasket and torque to manufacturer specifications.

3. Inspect and Repair Wiring/Connectors

1. Visually inspect the wiring harness and connectors related to the TCM.
2. Look for frayed wires, loose connections, or corrosion.
3. Repair or replace any damaged wiring or connectors.

4. Replacing the Transmission Control Module (if necessary)

1. If the TCM is determined to be faulty, remove it:
   • Disconnect all electrical connectors from the TCM.
   • Remove the mounting bolts securing the TCM to its bracket.
   • Install the new TCM by reversing the removal steps.
2. Reconnect all connectors ensuring they are secure.

5. Reconnect Battery and Clear Codes

1. Reconnect the negative battery terminal.
2. Use the OBD-II scanner to clear the P0700 code and any other transmission-related codes.
3. Perform a test drive to ensure the issue is resolved.