how to fix P0131 oxygen sensor code on Ford Explorer Sixth Generation (2020-present)

Learn how to diagnose and fix P0131 oxygen sensor code in Ford Explorer. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool completely before starting work.

2. Remove the Old Oxygen Sensor

• Locate the upstream oxygen sensor (Bank 1, Sensor 1) on the exhaust manifold.
• Use a socket wrench with an oxygen sensor socket to unscrew the old sensor.

3. Inspect and Clean

• Inspect the wiring and connector for any signs of damage or corrosion. Replace if necessary.
• Clean the threads on the exhaust manifold to ensure a proper seal for the new sensor.

4. Install the New Oxygen Sensor

• Apply anti-seize compound to the threads of the new oxygen sensor (if not pre-coated).
• Screw the new oxygen sensor into the exhaust manifold and tighten it to the manufacturer’s specifications (usually around 30-40 lb-ft).
• Reconnect the electrical connector securely.

5. Reconnect Battery and Clear Codes

• Reconnect the battery terminals.
• Use the OBD-II scanner to clear the P0131 code from the vehicle’s computer.

6. Test Drive

• Start the engine and let it idle. Observe the oxygen sensor voltage with a multimeter to ensure it fluctuates properly.
• Take the vehicle for a test drive to ensure that the check engine light does not return and to verify that the engine runs smoothly.