how to fix P0700 code on Honda Accord 9th Generation (2013-2017)

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, transmission fluid pressure gauge, multimeter, funnel, safety gloves, and safety glasses.
• Allow the vehicle to cool down before starting work.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Transmission Fluid

• Check the transmission fluid level using the dipstick.
  • If low, add the correct type of fluid (Honda ATF DW-1).
  • If fluid is dirty or has a burnt smell, proceed to drain and replace.
• Sub-steps:
  1. Place a drain pan under the transmission and remove the drain plug.
  2. Allow fluid to completely drain.
  3. Replace the drain plug and torque it to manufacturer specifications (typically around 30 ft-lbs).
  4. Refill the transmission with new fluid using a funnel until it reaches the proper level.

3. Inspect and Repair Wiring/Connectors

• Tools Required: Multimeter.
• Check the wiring harness and connectors for the TCM for any signs of wear or corrosion.
• Sub-steps:
  1. Disconnect the TCM connector.
  2. Use a multimeter to check for continuity and proper voltage at the connector.
  3. Repair or replace any damaged wiring or connectors.

4. Replace Transmission Control Module (if necessary)

• If diagnostics indicate a faulty TCM, replacement may be required.
• Sub-steps:
  1. Disconnect the battery.
  2. Locate the TCM, typically found near the transmission.
  3. Remove the mounting bolts and disconnect the wiring harness.
  4. Install the new TCM and reconnect the wiring harness.
  5. Reinstall the bolts and torque them to specifications.

5. Reset the ECM

• After repairs, reset the ECM to clear the P0700 code.
• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Use the OBD-II scanner to clear the codes.
  3. Start the vehicle to check if the check engine light remains off.