how to fix P0135 code in 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

451 words

Problem Statement

Learn how to diagnose and fix P0135 oxygen sensor issue in 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 battery before working on electrical systems.
•Allow the engine to cool before working on exhaust components.

Symptoms

•Check engine light illuminated
•Poor fuel economy
•Rough idle
•Increased emissions
•Engine performance issues (e.g., sluggish acceleration)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to confirm P0135 and check for additional codes.
2
Inspect the wiring and connectors leading to the Bank 1 sensor 1 for damage, corrosion, or loose connections.
3
Measure the voltage at the oxygen sensor connector with a multimeter to check for proper operation.
4
Check the vehicle’s fuse related to the oxygen sensor circuit.
5
Test the oxygen sensor for functionality by performing a heater resistance test.
6
Inspect the exhaust system for leaks that could affect oxygen sensor readings.

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
•Socket set
•Torque wrench
•Oxygen sensor socket

Parts Required

•New oxygen sensor (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 and check for additional codes.
2
Inspect the wiring and connectors leading to the Bank 1 sensor 1 for damage, corrosion, or loose connections.
3
Measure the voltage at the oxygen sensor connector with a multimeter to check for proper operation.
4
Check the vehicle’s fuse related to the oxygen sensor circuit.
5
Test the oxygen sensor for functionality by performing a heater resistance test.
6
Inspect the exhaust system for leaks that could affect oxygen sensor readings.

Solution

1. Preparation

Tools Required: OBD-II scanner, multimeter, socket set, torque wrench, oxygen sensor socket.
Disconnect the negative battery terminal to ensure safety during repairs.

2. Remove the Faulty Oxygen Sensor

Locate the Bank 1 sensor 1 oxygen sensor (typically located before the catalytic converter).
Use the oxygen sensor socket to carefully unscrew the sensor from the exhaust pipe.
Inspect the threads and sealing surface for any debris or damage.

3. Install the New Oxygen Sensor

Apply anti-seize compound to the threads of the new oxygen sensor (if not pre-applied).
Carefully thread the new oxygen sensor into the exhaust pipe by hand to avoid cross-threading.
Tighten the sensor to the manufacturer's specifications (typically around 30 lb-ft).

4. Reconnect Electrical Connections

Ensure that the wiring harness is undamaged and properly connected to the new oxygen sensor.
Reconnect the negative battery terminal.

5. Clear Codes and Test

Use the OBD-II scanner to clear the P0135 code from the vehicle’s computer.
Start the engine and allow it to reach operating temperature, then monitor for any reoccurrence of the code.