how to troubleshoot Ford F-150 13th Generation (2015-2020) oxygen sensor failure

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

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

506 words

Problem Statement

Learn how to troubleshoot and fix oxygen sensor failure in Ford F-150 (2015-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Exhaust System

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Always disconnect the battery before working on electrical systems.
•Allow the engine to cool before working on exhaust components.

Symptoms

•Check engine light illuminated
•Rough idle or stalling
•Decreased fuel efficiency
•Increased exhaust emissions
•Poor engine performance during acceleration

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any fault codes related to the oxygen sensor.
2
Inspect the oxygen sensor wiring and connectors for damage or corrosion.
3
Check the oxygen sensor's heater circuit with a multimeter to ensure proper resistance (typically 6-12 ohms).
4
Test the sensor voltage output at idle and while revving the engine to ensure it fluctuates between 0.1V to 0.9V.
5
Inspect exhaust leaks before the oxygen sensor that could affect readings.
6
Verify the fuel trim readings with a scan tool to assess if they are within expected ranges.

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
•Safety glasses
•Gloves

Parts Required

•Oxygen sensor (specific to the vehicle's engine and configuration)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any fault codes related to the oxygen sensor.
2
Inspect the oxygen sensor wiring and connectors for damage or corrosion.
3
Check the oxygen sensor's heater circuit with a multimeter to ensure proper resistance (typically 6-12 ohms).
4
Test the sensor voltage output at idle and while revving the engine to ensure it fluctuates between 0.1V to 0.9V.
5
Inspect exhaust leaks before the oxygen sensor that could affect readings.
6
Verify the fuel trim readings with a scan tool to assess if they are within expected ranges.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Tools Required: OBD-II scanner, multimeter, socket set, torque wrench, oxygen sensor socket, safety glasses, gloves.
Ensure the vehicle is parked on a level surface and the engine is cool.

2. Disconnect Battery

Disconnect the negative terminal of the battery to prevent electrical shorts.
Safety Warning: Always disconnect the battery before working on electrical components.

3. Remove Old Oxygen Sensor

Locate the oxygen sensor (usually on the exhaust manifold or downpipe).
Use an oxygen sensor socket to unscrew the sensor carefully.
Inspect the threads for damage; clean if necessary.

4. Install New Oxygen Sensor

Apply anti-seize compound to the threads of the new oxygen sensor (if not pre-applied).
Screw the new sensor into place by hand to avoid cross-threading.
Tighten it to the manufacturer’s specifications (typically 30-50 lb-ft).

5. Reconnect Battery

Reconnect the negative terminal of the battery securely.

6. Clear Error Codes

Use the OBD-II scanner to clear any existing error codes from the vehicle's computer.