how to clear the P0420 code in my Ford Explorer Sixth Generation (2020-present)?

Solution

1. Preparation

• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Gather necessary tools and parts.

2. Inspect Oxygen Sensors

• Tools Required: OBD-II scanner, multimeter
• Sub-steps:
  1. Locate the upstream and downstream oxygen sensors on the exhaust system.
  2. Disconnect the wiring harness from each oxygen sensor.
  3. Use a multimeter to check the resistance of the sensors. Compare to manufacturer specifications.
  4. Replace any faulty oxygen sensors.

3. Examine the Catalytic Converter

• Tools Required: Socket set, torque wrench
• Sub-steps:
  1. Raise the vehicle using jack stands for safe access to the undercarriage.
  2. Inspect the catalytic converter for dents, cracks, or signs of overheating.
  3. If damaged, remove the catalytic converter by disconnecting the bolts at both ends.
  4. Install a new catalytic converter, ensuring proper alignment and torque specifications.

4. Clear the Code

• Tools Required: OBD-II scanner
• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Use the OBD-II scanner to clear the P0420 code from the vehicle's computer.
  3. Conduct a test drive for approximately 20-30 minutes to monitor for any reoccurrence of the code.