how to fix P0700 transmission control system malfunction code in Honda Accord Eleventh Generation (2...

Solution

1. Preparation

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

2. Transmission Fluid Change

• Sub-steps:
  1. Remove the transmission drain plug and drain the old fluid into a suitable container.
  2. Replace the transmission drain plug and torque to manufacturer specifications (typically around 25 ft-lbs).
  3. Remove the transmission fluid fill plug.
  4. Use a funnel to add new transmission fluid (Honda ATF DW-1) through the fill hole until it reaches the appropriate level as indicated by the dipstick.

Tools Required:

• OBD-II scanner
• Socket set
• Torque wrench
• Fluid funnel
• Transmission fluid (Honda ATF DW-1)
• Container for old fluid

3. Inspect and Replace Transmission Solenoids

• Sub-steps:
  1. Remove the transmission pan by loosening the bolts and carefully prying it off to avoid damage.
  2. Clean the mating surfaces of the transmission and pan.
  3. Identify and remove the defective solenoids, noting their positions.
  4. Install new solenoids by reversing the removal process and ensuring proper seating.
  5. Reinstall the transmission pan with a new gasket, tightening bolts to the specified torque (approximately 10 ft-lbs).

4. TCM Testing and Replacement (if necessary)

• Sub-steps:
  1. Reconnect the battery and use an OBD-II scanner to clear any stored codes.
  2. Test drive the vehicle to see if the P0700 code reappears.
  3. If issues persist, replace the TCM by disconnecting the wiring harness and bolts, then installing the new module and reconnecting everything.