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

Honda Pilot YF3 (2016-2022)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

Error Code: P0135

3 min read

528 words

Problem Statement

Learn how to diagnose and fix P0135 O2 sensor heater circuit issues in Honda Pilot YF3 (2016-2022). Step-by-step guide with diagnostic procedures and repair instructions.

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 down before inspecting the exhaust components.

Symptoms

•Check engine light illuminated
•Decreased fuel efficiency
•Rough engine idle
•Increased exhaust emissions
•Failed emissions test

Diagnostic Steps

1
Scan the vehicle's computer using an OBD-II scanner to confirm the P0135 code and check for any additional codes.
2
Inspect the wiring and connectors for the upstream oxygen sensor for signs of damage, corrosion, or loose connections.
3
Measure the resistance of the heater element in the O2 sensor using a multimeter to determine if it is within the manufacturer's specifications.
4
Check the O2 sensor heater circuit for voltage using a multimeter while the engine is running.
5
Inspect the power and ground circuit for continuity and proper voltage.
6
Clear the code and perform a test drive to see if the code returns.

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
•O2 sensor socket
•Ratchet
•Torque wrench

Parts Required

•New upstream O2 sensor (Bank 1 Sensor 1)

Related Faults

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Diagnostic Steps

1
Scan the vehicle's computer using an OBD-II scanner to confirm the P0135 code and check for any additional codes.
2
Inspect the wiring and connectors for the upstream oxygen sensor for signs of damage, corrosion, or loose connections.
3
Measure the resistance of the heater element in the O2 sensor using a multimeter to determine if it is within the manufacturer's specifications.
4
Check the O2 sensor heater circuit for voltage using a multimeter while the engine is running.
5
Inspect the power and ground circuit for continuity and proper voltage.
6
Clear the code and perform a test drive to see if the code returns.

Solution

1. Preparation

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

2. Inspect and Replace the O2 Sensor

Tools Required: O2 sensor socket, ratchet, torque wrench, multimeter
Locate the upstream O2 sensor (Bank 1 Sensor 1) near the exhaust manifold.
Disconnect the electrical connector from the O2 sensor.
Use the O2 sensor socket to unscrew the sensor from the exhaust pipe.
Install the new O2 sensor by threading it into the exhaust pipe and tightening it to the manufacturer’s torque specification (usually around 30 lb-ft).
Reconnect the electrical connector securely.

3. Repair Wiring and Connections (if applicable)

If damaged wiring or connectors were found during diagnostics, repair or replace as necessary.
Use heat-shrink tubing or electrical tape to cover any exposed wires.
Ensure all connections are clean, secure, and free of corrosion.

4. Reconnect Battery and Test

Reconnect the negative battery terminal.
Start the engine and let it reach operating temperature.
Check for any additional codes using the OBD-II scanner and ensure P0135 does not return.