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Home/Cars/Honda/Accord/11th Gen (2023-Present)/how to fix the P0135 code on my Honda Civic 11th Generation (2022-Present)

how to fix the P0135 code on my Honda Civic 11th Generation (2022-Present)

Honda Accord 11th Gen (2023-Present)

Error Codes
Severity: mediumDifficulty: mediumError Code: P01351-2 hours
3 min read
499 words

Problem Statement

Learn how to diagnose and fix P0135 oxygen sensor heater circuit issue in Honda Civic 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

  • ⚠Disconnect battery before working on electrical components.
  • ⚠Allow engine to cool before opening any engine compartments or exhaust systems.

Symptoms

  • •Check engine light illuminated
  • •Poor fuel economy
  • •Rough idle or engine stalling
  • •Increased emissions
  • •Failure to pass emissions testing

Diagnostic Steps

  1. 1Scan for error codes using an OBD-II scanner to confirm the P0135 code.
  2. 2Inspect the wiring and connectors to the upstream oxygen sensor for any visible damage or corrosion.
  3. 3Check the heater circuit resistance of the oxygen sensor with a multimeter.
  4. 4Measure the voltage at the oxygen sensor connector with the engine running.
  5. 5Inspect the fuse related to the oxygen sensor heater circuit.
  6. 6Verify proper operation of the Engine Control Unit (ECU) by checking for software updates or known issues.

Solution

Solution

1. Preparation

  • Gather necessary tools and parts for the repair.
  • Disconnect the vehicle battery to prevent electrical shock.
  • Allow the engine to cool before proceeding with repairs.

2. Inspect Wiring and Connectors

  • Remove the plastic cover or protective sheathing over the oxygen sensor wiring.
  • Check for frayed wires, broken connectors, or corrosion.
  • Clean any corrosion using a wire brush or contact cleaner.

3. Replace Oxygen Sensor

  • Locate the upstream oxygen sensor (typically found in the exhaust manifold).
  • Use a socket wrench and oxygen sensor socket to remove the faulty sensor.
  • Apply anti-seize compound to the threads of the new oxygen sensor.
  • Install the new oxygen sensor and tighten it to the manufacturer’s specifications (usually around 30 Nm or 22 lb-ft).

4. Check and Replace Fuse

  • Locate the fuse box and identify the fuse for the oxygen sensor heater circuit.
  • Inspect the fuse and replace it if it is blown.
  • Ensure the new fuse matches the required amperage.

5. Reconnect Battery and Clear Codes

  • Reconnect the battery terminal securely.
  • Use the OBD-II scanner to clear the P0135 code from the ECU.

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
  • •Socket wrench set
  • •Torque wrench
  • •Wire brush or contact cleaner

Parts Required

  • •New upstream oxygen sensor
  • •Replacement fuse (if necessary)

Additional Information

Error Code
P0135
Affected Component
Exhaust System
Estimated Time
1-2 hours
Difficulty
medium
Severity
medium
Tools Required
6 items
Parts Required
2 items

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