how to fix the P0135 code on Honda CR-V Fifth Generation (2017-2022)

Honda CR-V 6th Gen (2023-Present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

Error Code: P0135

3 min read

529 words

Problem Statement

Learn how to diagnose and fix P0135 oxygen sensor issue in Honda CR-V (2017-2022). 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 exhaust system to cool before handling components to avoid burns.

Symptoms

•Check engine light illuminated
•Poor fuel economy
•Rough engine idle
•Decreased acceleration response
•Increased emissions

Diagnostic Steps

1
Scan the vehicle's OBD-II system to confirm the P0135 code.
2
Inspect the oxygen sensor wiring and connector for any visible damage or corrosion.
3
Check the sensor's heater circuit using a multimeter to ensure it’s receiving the proper voltage and ground.
4
Measure the resistance of the oxygen sensor heater element to verify if it is within specifications.
5
Look for any exhaust leaks that may affect sensor performance.
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
•Oxygen sensor socket
•Multimeter
•Torque wrench
•Basic hand tools (ratchet, sockets, wrenches)

Parts Required

•New Bank 1 Sensor 1 oxygen sensor
•Anti-seize compound (if applicable)

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Diagnostic Steps

1
Scan the vehicle's OBD-II system to confirm the P0135 code.
2
Inspect the oxygen sensor wiring and connector for any visible damage or corrosion.
3
Check the sensor's heater circuit using a multimeter to ensure it’s receiving the proper voltage and ground.
4
Measure the resistance of the oxygen sensor heater element to verify if it is within specifications.
5
Look for any exhaust leaks that may affect sensor performance.
6
Clear the code and perform a test drive to see if the code returns.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the vehicle battery.
Ensure the vehicle is on a level surface and secured with wheel chocks.

2. Remove the Oxygen Sensor

Locate the Bank 1 Sensor 1 oxygen sensor (upstream) in the exhaust manifold.
Use an oxygen sensor socket to carefully unscrew the sensor from its mounting.
Disconnect the electrical connector from the sensor.

3. Inspect and Replace

Inspect the old oxygen sensor for signs of wear or damage.
If the sensor is faulty, install a new oxygen sensor. Ensure it is compatible with the vehicle.
Apply anti-seize compound to the threads of the new sensor (if recommended by the manufacturer).
Screw the new sensor into place and tighten it to the manufacturer’s torque specification (typically around 30-40 Nm).

4. Reconnect Electrical Connections

Reconnect the electrical connector to the new oxygen sensor ensuring it clicks into place.
Check all wiring and connections for security and proper routing away from hot or moving parts.

5. Reconnect Battery and Test

Reconnect the vehicle battery.
Start the engine and let it idle for a few minutes, monitoring for any abnormal sounds or behaviors.
Take the vehicle for a test drive to ensure proper operation and check if the check engine light remains off.