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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Check and Replace Transmission Fluid

• Tools Required: Funnel, transmission fluid, fluid pump (if necessary).
• Remove the transmission dipstick and check the fluid level.
• If fluid is low, add the appropriate Honda transmission fluid (CVT fluid for CVT models, ATF for automatic models).
• If the fluid is dark or smells burnt, drain and replace with fresh fluid.

3. Inspect and Repair Wiring/Connectors

• Tools Required: Multimeter, wire brush, electrical cleaner.
• Inspect the wiring harness connected to the TCM for any signs of wear or damage.
• Use a multimeter to check for continuity in the wiring.
• Clean connections with electrical cleaner and re-tighten or replace any damaged connectors.

4. Replace or Reprogram Transmission Control Module

• Parts Required: New TCM (if needed).
• Remove any covers or components obstructing access to the TCM.
• Disconnect the TCM wiring harness.
• Remove the TCM from its mounting position.
• Install the new or reprogrammed TCM and reconnect the wiring harness.
• Ensure all connections are secure.

5. Reset the Transmission Control System

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0700 code and any related codes.
• Perform a relearn procedure if required by the vehicle (refer to manufacturer specifications).