how to troubleshoot P0700 code on my Honda Civic 9th Generation (2012-2015)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety during repairs.

2. Transmission Fluid Change

• Sub-steps:
  1. Raise the vehicle using a jack and secure it with jack stands.
  2. Locate the transmission drain plug and place a drain pan underneath.
  3. Remove the drain plug and allow the fluid to completely drain from the transmission.
  4. Replace the drain plug with a new gasket and torque it to manufacturer specifications.
  5. Remove the transmission fill plug and add new transmission fluid using a funnel, ensuring the fluid type matches Honda specifications (typically Honda ATF-Z1 or DW-1).
  6. Start the engine, cycle through the gears, and check the fluid level with the dipstick; add more fluid if necessary.

3. Repair or Replace TCM

• Sub-steps:
  1. If TCM issues are identified, locate the TCM, usually found near the transmission.
  2. Disconnect the wiring harness from the TCM.
  3. Remove the TCM mounting bolts and carefully take out the TCM.
  4. Install the new TCM by reversing the removal process.
  5. Reconnect the wiring harness ensuring a secure fit.

4. Inspect Input/Output Speed Sensors

• Sub-steps:
  1. Locate the input and output speed sensors on the transmission.
  2. Disconnect the wiring harness from each sensor.
  3. Remove the sensors using a socket set.
  4. Inspect the sensors for wear or damage; replace if necessary.
  5. Reinstall the sensors and reconnect the wiring harness.