what causes the P0131 code on Ford F-150 Fourteenth Generation (2021-present) and how to fix it?

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, socket set, torque wrench, new oxygen sensor, wiring harness (if applicable).
• Disconnect the negative battery terminal to ensure safety while working on the electrical system.

2. Remove the Oxygen Sensor

• Locate the Bank 1 Sensor 1 oxygen sensor (usually before the catalytic converter).
• Use a socket wrench to carefully unscrew the oxygen sensor from the exhaust manifold.
• Disconnect the sensor's electrical connector by pressing the release tab and pulling it apart.

3. Inspect and Clean

• Inspect the oxygen sensor and the wiring harness for any signs of damage or corrosion.
• If the wiring is damaged, repair or replace the wiring harness as needed.
• Clean the threads in 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 required).
• Install the new oxygen sensor into the exhaust manifold and tighten it to the manufacturer’s specified torque (typically around 30 lb-ft).
• Reconnect the electrical connector to the oxygen sensor.

5. Reconnect Battery and Test

• Reconnect the negative battery terminal.
• Start the engine and allow it to reach operating temperature.
• Use the OBD-II scanner to clear the fault codes and monitor the oxygen sensor readings to ensure proper function.