what does code P0135 mean for my Honda Accord 9th Generation (2013-2017)

Learn how to diagnose and fix P0135 oxygen sensor heater circuit issues in Honda Accord (2013-2017). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts needed for the repair. Ensure the vehicle is parked on a flat surface with the engine off and cooled down.
• Tools required: OBD-II scanner, multimeter, socket set, torque wrench, and ohmmeter.

2. Inspect and Repair Wiring

• Sub-steps:
  1. Disconnect the battery to prevent any electrical shorts.
  2. Locate the upstream oxygen sensor wiring harness and visually inspect for any signs of wear, fraying, or corrosion.
  3. If damage is found, repair the wiring using solder and heat shrink tubing or replace the wiring harness.

3. Replace Oxygen Sensor

• Sub-steps:
  1. Remove the upstream oxygen sensor using a socket wrench (typically a 22mm wrench).
  2. Install the new oxygen sensor, making sure to use anti-seize compound on the threads if required.
  3. Torque the sensor to the manufacturer's specifications (commonly around 30 lb-ft).
  4. Reconnect the oxygen sensor connector securely.

4. Check and Replace Fuse

• Sub-steps:
  1. Locate the fuse box and identify the fuse related to the oxygen sensor heater circuit.
  2. Remove the fuse and inspect it for continuity using a multimeter.
  3. If the fuse is blown, replace it with the correct amperage fuse.

5. Final Checks

• Sub-steps:
  1. Reconnect the battery.
  2. Clear the trouble codes using the OBD-II scanner.
  3. Start the engine and allow it to reach operating temperature, monitoring the check engine light.