how to fix P0700 transmission code in 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 off.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Check and Replace Transmission Fluid

• Sub-steps:
  1. Locate the transmission dipstick and remove it.
  2. Inspect fluid color and smell; if burnt or dark, it needs replacement.
  3. Drain the old transmission fluid using a fluid extractor or by removing the drain plug.
  4. Replace with manufacturer-recommended transmission fluid (e.g., Mercon LV for Ford).
  5. Reinsert the dipstick and check fluid levels after refilling.

3. Inspect and Repair Wiring

• Sub-steps:
  1. Visually inspect wiring harness connected to the TCM for any frays or breaks.
  2. Use a multimeter to test for continuity in each wire.
  3. Repair or replace any damaged wiring or connectors.

4. Test and Replace the Transmission Control Module (if necessary)

• Sub-steps:
  1. Remove TCM from its mounting location (consult service manual for specific removal instructions).
  2. Inspect the TCM for physical damage or corrosion.
  3. Install a new TCM if the old one is faulty (ensure it is programmed to your vehicle).
  4. Reconnect all wiring and secure the TCM back into place.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear all stored codes and reset the check engine light.