why does my Ford F-150 14th Generation (2021-2024) have a check engine light and codes P0868

Learn how to diagnose and fix P0868 transmission fluid pressure issue in Ford F-150 (2021-2024). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is on a flat surface, and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Check Transmission Fluid

• Tools Required: Transmission fluid dipstick, funnel, clean rags
• Remove the transmission dipstick and check the fluid level.
• If low, add the appropriate type of transmission fluid as specified in the owner's manual (typically Mercon LV for most F-150s).
• Inspect fluid color and consistency; it should be a bright red and free of debris or burnt smell.

3. Inspect and Replace Transmission Fluid Filter

• Tools Required: Socket set, torque wrench, new transmission filter, new gasket, transmission fluid
• Remove the transmission pan using a socket set and drain the fluid into a suitable container.
• Replace the transmission filter and gasket according to the manufacturer's specifications.
• Reinstall the pan and torque bolts to the specified torque (usually around 10-12 ft-lbs).

4. Inspect Wiring and Connectors

• Tools Required: Multimeter, wire brush, electrical cleaner
• Use a multimeter to test the resistance of the transmission fluid temperature sensor.
• Clean any corrosion from the connectors using electrical cleaner and a wire brush.
• Repair or replace any damaged wiring or connectors to ensure proper connections.

5. Reconnect and Test

• Reconnect the negative battery terminal.
• Start the engine and allow it to warm up to operating temperature.
• Check for leaks around the transmission and ensure proper fluid levels.
• Test drive the vehicle to confirm that the transmission operates smoothly and that the check engine light remains off.