how to fix P0135 oxygen sensor code on Toyota RAV4 Fourth Generation (2013-2018)

Toyota RAV4 Fourth Generation (2013-2018)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

Error Code: P0135

3 min read

469 words

Problem Statement

Learn how to diagnose and fix P0135 oxygen sensor code in Toyota RAV4 (2013-2018). 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 battery before working on electrical systems.
•Allow the engine to cool before opening the exhaust system.

Symptoms

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

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to confirm P0135 and check for additional codes.
2
Inspect the wiring and connectors of the upstream oxygen sensor for signs of damage or corrosion.
3
Measure the resistance of the oxygen sensor heater circuit using a multimeter.
4
Check the vehicle’s fuse box for blown fuses related to the oxygen sensor heater circuit.
5
Test the voltage at the oxygen sensor connector with the engine running to ensure proper power supply.

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
•Wrench set
•Multimeter
•Electrical contact cleaner

Parts Required

•New upstream oxygen sensor
•Anti-seize compound

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to confirm P0135 and check for additional codes.
2
Inspect the wiring and connectors of the upstream oxygen sensor for signs of damage or corrosion.
3
Measure the resistance of the oxygen sensor heater circuit using a multimeter.
4
Check the vehicle’s fuse box for blown fuses related to the oxygen sensor heater circuit.
5
Test the voltage at the oxygen sensor connector with the engine running to ensure proper power supply.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the vehicle's battery to prevent electrical shock.
Allow the engine to cool before working on the exhaust system.

2. Remove the Oxygen Sensor

Locate the upstream oxygen sensor (usually near the exhaust manifold).
Use an oxygen sensor socket or a wrench to loosen and remove the sensor.
Carefully disconnect the wiring harness from the sensor.

3. Inspect and Clean

Inspect the oxygen sensor connector for corrosion or damage. Clean the connector with electrical contact cleaner if necessary.
Check the wiring for any frays or breaks and repair as needed.

4. Install New Oxygen Sensor

Apply anti-seize compound to the threads of the new oxygen sensor (if not pre-applied).
Install the new sensor into the exhaust system and tighten to the manufacturer's specifications (typically around 30 ft-lbs).
Reconnect the wiring harness to the new oxygen sensor.

5. Reconnect Battery and Clear Codes

Reconnect the vehicle’s battery.
Use the OBD-II scanner to clear the P0135 code from the system.