how to fix P0700 code in Honda Accord 8th Generation (2008-2012)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is on a flat surface and securely lifted with jack stands.
• Disconnect the negative battery terminal to avoid electrical shock.

2. Check and Replace Transmission Fluid

• Tools Required: Transmission fluid pump, fluid catch pan, funnel.
• Remove the transmission fluid dipstick and check fluid level.
• If low, add the recommended transmission fluid (Honda ATF Z1 or DW-1) as needed.
• If fluid is burnt or contaminated, drain the transmission fluid:
  • Place a catch pan under the transmission pan.
  • Remove the transmission pan bolts using a socket set.
  • Carefully lower the pan and drain the fluid.
  • Install a new transmission filter if applicable.
  • Reinstall the transmission pan with a new gasket and torque bolts to manufacturer specifications.

3. Inspect and Repair Wiring/Connectors

• Tools Required: Multimeter, wire stripper, electrical tape.
• Visually inspect all wiring harnesses and connectors leading to the TCM.
• Use a multimeter to check for continuity and proper voltage.
• Repair or replace any damaged wires or connectors as necessary.

4. Test and Replace TCM (if needed)

• Tools Required: OBD-II scanner, basic hand tools for removal.
• If diagnostics show a faulty TCM, disconnect the battery again.
• Locate the TCM (usually found under the dashboard or near the transmission).
• Remove the mounting bolts and disconnect the wiring harness.
• Install the new TCM, reconnect the harness, and secure it with mounting bolts.
• Reconnect the negative battery terminal.