how to fix P0135 O2 sensor code on Ford F-150 13th Generation (2015-2020)

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

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

Error Code: P0135

3 min read

504 words

Problem Statement

Learn how to diagnose and fix P0135 O2 sensor code on Ford F-150 (2015-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Error Code

P0135

Affected Component

Exhaust System

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•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 idle
•Engine stalling during acceleration
•Increased emissions

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to confirm P0135 is the only code present.
2
Visual inspection of the wiring and connectors to the upstream O2 sensor for any signs of damage or corrosion.
3
Measure the voltage output of the O2 sensor with a multimeter while the engine is running.
4
Check the heater circuit of the O2 sensor using a multimeter to ensure it is receiving the correct voltage.
5
Inspect the vehicle’s fuse box for any blown fuses related to the O2 sensor or engine management systems.

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
•O2 sensor socket or wrench
•Torque wrench
•Anti-seize compound

Parts Required

•New O2 sensor (specific to Ford F-150, Bank 1 Sensor 1)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to confirm P0135 is the only code present.
2
Visual inspection of the wiring and connectors to the upstream O2 sensor for any signs of damage or corrosion.
3
Measure the voltage output of the O2 sensor with a multimeter while the engine is running.
4
Check the heater circuit of the O2 sensor using a multimeter to ensure it is receiving the correct voltage.
5
Inspect the vehicle’s fuse box for any blown fuses related to the O2 sensor or engine management systems.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Disconnect the negative terminal of the battery to prevent electrical shorts.
Allow the engine to cool before starting work on the O2 sensor.

2. Remove the Faulty O2 Sensor

Locate the Bank 1 Sensor 1 O2 sensor (typically found before the catalytic converter).
Disconnect the electrical connector from the O2 sensor.
Using an O2 sensor socket or a wrench, carefully unscrew the sensor from the exhaust manifold.

3. Install the New O2 Sensor

Apply anti-seize compound to the threads of the new O2 sensor to prevent seizing.
Screw the new sensor into the exhaust manifold and tighten it to the manufacturer's specifications (usually around 30-50 ft-lbs, check specific service manual for exact value).
Reconnect the electrical connector to the new O2 sensor.

4. Reconnect Battery and Clear Codes

Reconnect the negative terminal of the battery.
Use an OBD-II scanner to clear the P0135 code.

5. Test the Repair

Start the engine and allow it to reach operating temperature.
Monitor the O2 sensor readings using a scanner to ensure it is functioning correctly.
Check for any reoccurrence of the P0135 code.