how to troubleshoot Ford F-150 transmission codes P0700 to P0799

Learn how to troubleshoot and fix transmission codes P0700 to P0799 in Ford F-150. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is on a flat surface and secure it with wheel chocks.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Fluid Change (if necessary)

• Tools Required: Transmission fluid pump, drain pan, socket set, funnel
• Drain the transmission fluid by removing the drain plug or pan.
• Replace the filter if applicable, ensuring to remove any old gasket material.
• Refill with the appropriate type and amount of transmission fluid as specified by the manufacturer.

3. Repair Electrical Connections

• Tools Required: Multimeter, wire brush, dielectric grease
• Inspect and clean the wiring and connectors associated with the TCM.
• Use a multimeter to test resistance and continuity of the wiring.
• Repair or replace any damaged wires or connectors and apply dielectric grease to prevent future corrosion.

4. Replace Transmission Range Sensor

• Tools Required: Socket set, torque wrench
• Locate the transmission range sensor on the transmission.
• Disconnect the electrical connector and remove the mounting bolts.
• Install the new sensor, ensuring it is properly aligned and secure.
• Reconnect the electrical connector and check for proper operation by shifting through all gears.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear all transmission-related codes.
• Take the vehicle for a test drive to ensure the issue is resolved.