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Home/Cars/Ford/F-150/14th Generation (2021-2024)/how to fix P0135 oxygen sensor code in Ford F-150 14th Generation (2021-2024)

how to fix P0135 oxygen sensor code in Ford F-150 14th Generation (2021-2024)

Ford F-150 14th Generation (2021-2024)

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

Problem Statement

Learn how to diagnose and fix P0135 oxygen sensor code in Ford F-150 14th Generation. 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 the battery before working on electrical systems.
  • ⚠Allow the exhaust system to cool down before handling the oxygen sensor.

Symptoms

  • •Check engine light illuminated
  • •Poor fuel economy
  • •Engine misfire or rough running
  • •Increased emissions
  • •Failed emissions test

Diagnostic Steps

  1. 1Scan the vehicle using an OBD-II scanner to confirm the presence of the P0135 code.
  2. 2Inspect the wiring and connectors for the Bank 1 Sensor 1 oxygen sensor for damage or corrosion.
  3. 3Check the fuse for the oxygen sensor heater circuit to ensure it is not blown.
  4. 4Measure the voltage supply to the oxygen sensor heater circuit using a multimeter.
  5. 5Test the resistance of the oxygen sensor heater element to determine if it is within specification.
  6. 6Inspect the exhaust system for leaks that may affect sensor readings.

Solution

Solution

1. Preparation

  • Gather necessary tools and parts.
  • Disconnect the negative battery terminal to ensure safety.

2. Remove the Oxygen Sensor

  1. Locate the Bank 1 Sensor 1 oxygen sensor (typically located upstream of the catalytic converter).
  2. Use an oxygen sensor socket to carefully unscrew the sensor from the exhaust pipe.
  3. Disconnect the electrical connector from the oxygen sensor.

3. Inspect and Test the Wiring

  1. Visually inspect the wiring harness for any signs of wear or damage.
  2. Use a multimeter to check for continuity in the wiring between the sensor and the engine control module (ECM).
  3. If any wiring is damaged, repair or replace as necessary.

4. Replace the Oxygen Sensor

  1. Apply anti-seize compound to the threads of the new oxygen sensor (if applicable).
  2. Install the new oxygen sensor into the exhaust pipe and tighten it to the manufacturer's torque specification (typically around 30 lb-ft).
  3. Reconnect the electrical connector to the new oxygen sensor.

5. Reconnect Battery and Clear Codes

  1. Reconnect the negative battery terminal.
  2. Use the OBD-II scanner to clear the P0135 code from the ECM.

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
  • •Anti-seize compound

Parts Required

  • •New oxygen sensor for Bank 1 Sensor 1

Additional Information

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

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