how to fix P0135 code in Honda Pilot YF3 (2016-2022)

Honda Pilot Third Generation (2016-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

Error Code: P0135

3 min read

505 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix P0135 oxygen sensor heater circuit issues in Honda Pilot YF3 (2016-2022). Step-by-step guide with tools and tips.

Error Code

P0135

Affected Component

Exhaust System

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before working on the exhaust system.

Symptoms

•Check engine light illuminated
•Poor fuel economy
•Rough idle
•Increased emissions
•Engine stalling or hesitating during acceleration

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner and confirm the presence of P0135.
2
Visually inspect the wiring and connectors of the upstream oxygen sensor for damage or corrosion.
3
Check the oxygen sensor heater circuit voltage using a multimeter.
4
Measure the resistance of the oxygen sensor heater to ensure it is within specification.
5
Inspect the vehicle’s fuse box for any blown fuses that may affect the oxygen sensor heater circuit.
6
Test the vehicle’s battery and charging system to ensure proper voltage levels.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Multimeter
•Oxygen sensor socket
•Wrench set
•Jack and jack stands

Parts Required

•OEM replacement upstream oxygen sensor

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner and confirm the presence of P0135.
2
Visually inspect the wiring and connectors of the upstream oxygen sensor for damage or corrosion.
3
Check the oxygen sensor heater circuit voltage using a multimeter.
4
Measure the resistance of the oxygen sensor heater to ensure it is within specification.
5
Inspect the vehicle’s fuse box for any blown fuses that may affect the oxygen sensor heater circuit.
6
Test the vehicle’s battery and charging system to ensure proper voltage levels.

Solution

1. Preparation

Gather tools and parts required.
Disconnect the negative battery terminal to ensure safety.
Raise the vehicle using a jack and secure it on jack stands if needed for access.

2. Oxygen Sensor Removal

Locate the upstream oxygen sensor (usually before the catalytic converter on the exhaust system).
Disconnect the electrical connector from the oxygen sensor.
Use an oxygen sensor socket or a wrench to unscrew the oxygen sensor from the exhaust system.
Remove the sensor carefully to avoid damaging the threads.

3. Inspect and Replace

Inspect the old oxygen sensor for signs of wear or damage.
If necessary, replace the old oxygen sensor with a new one.
- Tools Required: Oxygen sensor socket, wrench
- New Part: OEM replacement oxygen sensor compatible with Honda Pilot YF3

4. Reconnect and Test the Circuit

Reconnect the electrical connector to the new oxygen sensor.
Check the heater circuit voltage with the multimeter to ensure proper operation (should be around 12V when the engine is running).
Reconnect the negative battery terminal.

5. Clear Codes and Test Drive

Use the OBD-II scanner to clear the P0135 code from the vehicle's memory.
Perform a test drive to ensure the check engine light does not return and that the vehicle runs smoothly.