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What does error code P0135 indicate for a 2020 Toyota Camry? - Toyota Camry
Home/Cars/Toyota/Camry/Eighth Generation (2018-present)/What does error code P0135 indicate for a 2020 Toyota Camry?

What does error code P0135 indicate for a 2020 Toyota Camry?

Toyota Camry Eighth Generation (2018-present)

Error Codes
2-3 hours
Time
medium
Difficulty
medium
Severity
Error Code: P0135
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ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
663 words

Problem Statement

Learn about error code P0135 for the 2020 Toyota Camry, including symptoms, diagnostic steps, and repair instructions for the oxygen sensor circuit malfunction.

Error Code
P0135
Affected Component
Oxygen Sensor (O2 sensor)
Estimated Time
2-3 hours

Symptoms

  • •Check Engine Light
  • •Poor Fuel Economy
  • •Rough Idle
  • •Increased Emissions
  • •Failed Emission Test

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5

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
  • •Basic hand tools (socket set, wrenches)
  • •Torque wrench
  • •Safety glasses
  • •Mechanic's gloves
  • •Wiring diagram for reference

Additional Information

Error Code
P0135
Affected Component
Oxygen Sensor (O2 sensor)
Estimated Time
2-3 hours
Difficulty
medium
Severity
medium
Tools Required
7 items

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Error Code P0135: Overview

Definition: The error code P0135 indicates a malfunction in the oxygen sensor (O2 sensor) circuit for the bank 1 sensor 1. This sensor is crucial for monitoring the oxygen levels in the exhaust gases, which helps the engine control module (ECM) adjust the air-fuel mixture for optimal combustion.

Tools Required
  • OBD-II Scanner
  • Multimeter
  • Basic hand tools (socket set, wrenches)
  • Torque wrench
  • Safety glasses
  • Mechanic's gloves
  • Wiring diagram for reference
Repair Instructions

Step 1: Confirm and Document the Code

  1. Connect the OBD-II scanner to the vehicle's OBD port.
  2. Retrieve and document the P0135 code and any additional codes.

Step 2: Conduct a Visual Inspection

  1. Locate the O2 Sensor: For the 2020 Toyota Camry, the bank 1 sensor 1 is located upstream, near the exhaust manifold.
  2. Disconnect the O2 sensor connector and inspect the wiring for damage.
  3. Check for any exhaust leaks that could affect sensor readings.

Step 3: Test the O2 Sensor

  1. Voltage Testing:
    • Start the engine and let it warm up.
    • Using a multimeter, probe the signal wire (usually a black wire) and ground.
    • Verify that the voltage fluctuates as specified (0.1V to 0.9V).
  2. Heater Circuit Testing:
    • With the engine off, use the multimeter to measure the resistance of the heater circuit (typically 10-30 ohms).
    • If the resistance is infinite, the heater circuit is faulty.

Step 4: Replace the O2 Sensor (if required)

  1. Disconnect the Battery: Disconnect the negative terminal of the battery for safety.
  2. Remove the Old Sensor:
    • Use a socket wrench to remove the O2 sensor from the exhaust manifold.
    • Be cautious of heat; the exhaust system can be very hot.
  3. Install the New Sensor:
    • Apply anti-seize compound to the threads of the new O2 sensor (if not pre-coated).
    • Install the new sensor and torque it to the manufacturer’s specifications.
  4. Reconnect the Sensor Connector.

Step 5: Clear the Code and Test Drive

  1. Reconnect the battery and use the OBD-II scanner to clear the P0135 code.
  2. Take the vehicle for a test drive to ensure that the Check Engine Light does not return and that the vehicle is running smoothly.
Conclusion

If after replacing the O2 sensor the code persists, further diagnosis may be required to check wiring continuity, the ECM functionality, or other related components in the air-fuel mixture system. Always refer to the vehicle’s service manual for specific details and specifications.