how to fix P0135 code in Ford F-150 13th Generation (2015-2020)

Learn how to diagnose and fix P0135 oxygen sensor issue in Ford F-150 (2015-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, socket set, torque wrench, oxygen sensor socket.
• Disconnect the negative battery terminal to ensure safety during repairs.

2. Remove the Faulty Oxygen Sensor

• Locate the Bank 1 sensor 1 oxygen sensor (typically located before the catalytic converter).
• Use the oxygen sensor socket to carefully unscrew the sensor from the exhaust pipe.
• Inspect the threads and sealing surface for any debris or damage.

3. Install the New Oxygen Sensor

• Apply anti-seize compound to the threads of the new oxygen sensor (if not pre-applied).
• Carefully thread the new oxygen sensor into the exhaust pipe by hand to avoid cross-threading.
• Tighten the sensor to the manufacturer's specifications (typically around 30 lb-ft).

4. Reconnect Electrical Connections

• Ensure that the wiring harness is undamaged and properly connected to the new oxygen sensor.
• Reconnect the negative battery terminal.

5. Clear Codes and Test

• Use the OBD-II scanner to clear the P0135 code from the vehicle’s computer.
• Start the engine and allow it to reach operating temperature, then monitor for any reoccurrence of the code.