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

Solution

1. Preparation

• Tools Required: OBD-II scanner, jack and jack stands, fluid catch pan, socket set, multimeter, torque wrench.
• Before beginning repairs, disconnect the battery to avoid any electrical shorts. Allow the vehicle to cool down if the engine has been running.

2. Check Transmission Fluid

• Locate the transmission dipstick and remove it.
• Wipe it clean and reinsert it, then remove it again to check the fluid level.
• If the fluid is low, add the recommended transmission fluid (Honda ATF-Z1 or DW-1) until it reaches the correct level. If the fluid is dirty, proceed to change it.

3. Change Transmission Fluid and Filter

• Place a fluid catch pan under the transmission pan.
• Remove the transmission pan bolts with a socket set and carefully lower the pan to avoid spilling fluid.
• Replace the old filter with a new one (ensure it matches the OEM specifications).
• Clean the pan and the magnet inside it to remove any metal shavings or debris.
• Reinstall the pan with a new gasket and torque the bolts to the manufacturer’s specifications (typically around 10-12 ft-lbs).

4. Inspect and Repair Wiring

• Check wiring harness connected to the TCM for any frays or corrosion.
• Repair or replace any damaged wires or connectors.
• Ensure all connections are secure.

5. Reprogram TCM (if necessary)

• If a TCM replacement was required, reprogram it using the OBD-II scanner to ensure it is correctly configured to the vehicle.

6. Reconnect Battery and Perform Test Drive

• Reconnect the battery.
• Start the vehicle and observe if the check engine light is still illuminated.
• Perform a test drive to ensure the transmission shifts smoothly and that the P0700 code does not reappear.