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

Learn how to diagnose and fix P0135 oxygen sensor circuit issues in Ford F-150 (2015-2020). Step-by-step guide with tools and procedures included.

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shock.
• Raise the vehicle safely using jack stands if access to the undercarriage is required.

2. Inspect and Repair Wiring

• Sub-steps:
  • Visually inspect the wiring harness and connectors leading to the upstream oxygen sensor.
  • Repair or replace any damaged wires or connectors as necessary.
• Tools Required: Wire strippers/crimpers, electrical tape, heat shrink tubing.

3. Replace the Oxygen Sensor

• Sub-steps:
  • Locate the upstream oxygen sensor (Bank 1, Sensor 1) typically located before the catalytic converter.
  • Disconnect the sensor's electrical connector.
  • Use an oxygen sensor socket to remove the sensor from the exhaust manifold.
  • Apply anti-seize compound to the threads of the new sensor.
  • Install the new oxygen sensor and torque it to the manufacturer's specification (usually around 30 lb-ft).
  • Reconnect the electrical connector.
• Tools Required: Oxygen sensor socket, torque wrench, anti-seize compound.

4. Clear Codes and Test Drive

• Sub-steps:
  • Reconnect the battery.
  • Use the OBD-II scanner to clear the P0135 code.
  • Start the engine and allow it to reach operating temperature.
  • Perform a test drive to ensure proper operation and monitor for any return of the check engine light.
• Tools Required: OBD-II scanner.