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Home/Cars/Ford/F-150/13th Generation (2015-2020)/how to fix P0135 error code on my Ford F-150 13th Generation (2015-2020)

how to fix P0135 error code on my Ford F-150 13th Generation (2015-2020)

Ford F-150 13th Generation (2015-2020)

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

Problem Statement

Learn how to diagnose and fix P0135 oxygen sensor heater issues in Ford F-150 (2015-2020). Step-by-step guide with tools and procedures.

Error Code
P0135
Affected Component
Exhaust System
Estimated Time
1-2 hours

Safety Warnings

  • ⚠Disconnect the battery before working on electrical systems.
  • ⚠Allow the engine to cool before working on exhaust components to avoid burns.

Symptoms

  • •Check engine light illuminated
  • •Poor fuel economy
  • •Rough engine idle
  • •Decreased engine performance
  • •Failed emissions test
  • •Increased exhaust emissions

Diagnostic Steps

  1. 1Scan the vehicle's computer with an OBD-II scanner to confirm the P0135 error code.
  2. 2Inspect the wiring and connectors of the upstream oxygen sensor for any visible damage or corrosion.
  3. 3Measure the heater circuit resistance of the oxygen sensor using a multimeter.
  4. 4Check the fuse associated with the oxygen sensor heater circuit.
  5. 5Test the voltage supply to the oxygen sensor heater circuit while the engine is running.
  6. 6Inspect the engine coolant temperature sensor for proper function.

Solution

Solution

1. Preparation

  • Gather necessary tools and parts.
  • Ensure the vehicle is parked on a level surface and the ignition is off.
  • Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect Wiring and Connectors

  • Remove the protective cover to access the oxygen sensor wiring.
  • Visually inspect the wiring harness and connectors for frays, breaks, or corrosion.
  • Clean any corrosion with electrical contact cleaner and a wire brush if necessary.

3. Replace Oxygen Sensor (if faulty)

  • Tools Required: Oxygen sensor socket, ratchet, torque wrench.
  • Locate the upstream oxygen sensor on the exhaust manifold.
  • Disconnect the electrical connector from the oxygen sensor.
  • Use an oxygen sensor socket to unscrew the old sensor from the exhaust manifold.
  • 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 30-40 lb-ft).
  • Reconnect the electrical connector.

4. Check and Replace Fuse (if blown)

  • Locate the fuse box and identify the fuse for the oxygen sensor heater circuit.
  • Remove the fuse and check for continuity using a multimeter.
  • Replace with a new fuse of the same amperage if the old fuse is blown.

5. Reconnect Battery and Clear Codes

  • Reconnect the negative battery terminal.
  • Use the OBD-II scanner to clear the P0135 code from the vehicle's computer.
  • Start the engine and let it run for a few minutes to ensure everything is functioning properly.

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
  • •Ratchet and socket set
  • •Torque wrench
  • •Electrical contact cleaner

Parts Required

  • •Upstream oxygen sensor
  • •Fuse (if blown)

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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