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Home/Cars/Ford/F-150/12th Generation (2009-2014)/how to fix P0135 code on Ford F-150 12th Generation (2009-2014)

how to fix P0135 code on Ford F-150 12th Generation (2009-2014)

Ford F-150 12th Generation (2009-2014)

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

Problem Statement

Learn how to diagnose and fix P0135 oxygen sensor heater circuit issues in Ford F-150 (2009-2014). 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 engine to cool before touching any components on the exhaust system.

Symptoms

  • •Check engine light illuminated
  • •Rough idle
  • •Poor fuel economy
  • •Increased emissions
  • •Engine hesitation during acceleration

Diagnostic Steps

  1. 1Scan for error codes using an OBD-II scanner to confirm the presence of the P0135 code.
  2. 2Inspect the wiring and connectors leading to Bank 1 Sensor 1 for any visible damage or corrosion.
  3. 3Measure the resistance of the heater element in the oxygen sensor using a multimeter to ensure it is within specifications.
  4. 4Check the vehicle's fuse related to the oxygen sensor heater circuit to ensure it is not blown.
  5. 5Test the voltage supply to the oxygen sensor heater circuit with a multimeter to ensure proper voltage is present.
  6. 6Inspect for any exhaust leaks that may affect the sensor's operation.

Solution

Solution

1. Preparation

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

2. Remove the Oxygen Sensor

  • Locate Bank 1 Sensor 1 (usually on the exhaust manifold or upstream of the catalytic converter).
  • Use an oxygen sensor socket to carefully unscrew the sensor from its mount.
  • Disconnect the wiring harness from the sensor.

3. Inspect and Replace the Oxygen Sensor

  • Visually inspect the old oxygen sensor for any signs of damage or wear.
  • If the sensor is faulty, install a new sensor by screwing it into the exhaust manifold and reconnecting the wiring harness.
  • Apply anti-seize compound to the new sensor's threads to ensure a proper seal and easier future removal.

4. Check and Repair Wiring (if necessary)

  • Inspect the wiring harness for any frayed wires or poor connections.
  • If damaged, repair the wiring using solder and heat-shrink tubing or replace the harness if necessary.
  • Ensure that all connections are secure.

5. Reconnect Battery and Clear Codes

  • Reconnect the negative battery terminal.
  • 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
  • •Oxygen sensor socket
  • •Multimeter
  • •Basic hand tools (socket set, wrenches)

Parts Required

  • •New oxygen sensor (Bank 1 Sensor 1)

Additional Information

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

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