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

Solution

1. Preparation

• Gather necessary tools and ensure the vehicle is in a safe, stable position.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Tools Required: OBD-II scanner, multimeter, socket set, torque wrench.

2. Inspect and Replace Transmission Fluid

• Sub-steps:
  1. Locate the transmission dipstick and remove it to check fluid level.
  2. If fluid is low, add the appropriate Honda ATF (Automatic Transmission Fluid) to the fill mark.
  3. If fluid is dark or has a burnt smell, consider a complete fluid change.
• Tools Required: Transmission fluid pump, drain pan, funnel.

3. Inspect and Repair Wiring

• Sub-steps:
  1. Visually inspect the wiring harness leading to the TCM for frays or breaks.
  2. Use a multimeter to check continuity and resistance in the wires.
  3. Repair any damaged wiring by soldering or using heat-shrink connectors.
• Safety Warnings: Ensure the battery is disconnected before handling wiring.

4. Replace TCM (if necessary)

• Sub-steps:
  1. Locate the TCM, typically found near the transmission.
  2. Disconnect the electrical connectors carefully.
  3. Remove the mounting bolts using the socket set.
  4. Install the new TCM by reversing the removal steps and torqueing bolts to manufacturer specifications (refer to service manual for torque values).
• Tools Required: Socket set, torque wrench.

5. Clear Codes and Test Drive

• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Use the OBD-II scanner to clear the P0700 code and any other related codes.
  3. Perform a test drive to ensure the issue has been resolved and monitor for any reoccurrence of the code.