how to fix P0135 O2 sensor code on Ford F-150 13th Generation (2015-2020)

Learn how to diagnose and fix P0135 O2 sensor code on Ford F-150 (2015-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative terminal of the battery to prevent electrical shorts.
• Allow the engine to cool before starting work on the O2 sensor.

2. Remove the Faulty O2 Sensor

• Locate the Bank 1 Sensor 1 O2 sensor (typically found before the catalytic converter).
• Disconnect the electrical connector from the O2 sensor.
• Using an O2 sensor socket or a wrench, carefully unscrew the sensor from the exhaust manifold.

3. Install the New O2 Sensor

• Apply anti-seize compound to the threads of the new O2 sensor to prevent seizing.
• Screw the new sensor into the exhaust manifold and tighten it to the manufacturer's specifications (usually around 30-50 ft-lbs, check specific service manual for exact value).
• Reconnect the electrical connector to the new O2 sensor.

4. Reconnect Battery and Clear Codes

• Reconnect the negative terminal of the battery.
• Use an OBD-II scanner to clear the P0135 code.

5. Test the Repair

• Start the engine and allow it to reach operating temperature.
• Monitor the O2 sensor readings using a scanner to ensure it is functioning correctly.
• Check for any reoccurrence of the P0135 code.