how to fix P0700 code on my Ford F-150 13th Generation (2015-2020)

Solution

1. Preparation

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

2. Inspect and Replace Transmission Fluid

• Tools Required: Transmission fluid pump, socket set, torque wrench
• Check fluid level using the dipstick; if low, add the manufacturer-recommended fluid.
• If the fluid is discolored or burnt, drain the old fluid and replace it:
  1. Remove the drain plug or pan bolts.
  2. Allow fluid to drain completely.
  3. Replace the transmission filter (if applicable).
  4. Reinstall the drain plug and use a torque wrench to tighten to manufacturer specifications (typically around 10-12 ft-lbs).
  5. Refill with new transmission fluid through the dipstick tube, checking the level periodically.

3. Inspect and Repair Wiring and Connectors

• Tools Required: Multimeter, wire brush, electrical tape
• Visually inspect the wiring harness and connectors going to the TCM.
• Use a multimeter to check for continuity and proper voltage at the connectors.
• Clean any corrosion using a wire brush, and reconnect securely. If damaged, repair or replace wiring as needed.

4. TCM Testing and Replacement

• Tools Required: Multimeter, OBD-II scanner
• Test the TCM’s voltage and signal outputs using a multimeter.
• If the TCM is found to be malfunctioning:
  1. Remove the mounting bolts and disconnect the harness.
  2. Install the new TCM by reversing the removal steps.
  3. Reconnect the battery and clear any stored codes with the OBD-II scanner.