how to fix the service engine soon light on my Ford F-150 13th Generation (2015-2020)

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

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

563 words

Problem Statement

Learn how to diagnose and fix the Service Engine Soon light on your Ford F-150 (2015-2020). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Engine

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before inspecting or working on any components.

Symptoms

•Service Engine Soon light illuminated on the dashboard
•Decreased engine performance or rough idling
•Poor fuel economy
•Engine stalling during operation
•Increased emissions

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any active trouble codes.
2
Check the vehicle's fluid levels, including engine oil, coolant, and transmission fluid.
3
Inspect the gas cap for damage or improper sealing, as a loose cap can trigger the warning light.
4
Examine the air filter for clogging or contamination that may affect engine performance.
5
Test the battery and charging system to ensure they are functioning correctly.
6
Perform a visual inspection of all major engine components for leaks, damage, or wear.

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
•Socket set
•Torque wrench
•Screwdrivers
•Multimeter

Parts Required

•O2 sensor (if applicable)
•MAF sensor (if applicable)
•Engine air filter
•Engine oil (and filter if changing)
•Gas cap (if needed)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any active trouble codes.
2
Check the vehicle's fluid levels, including engine oil, coolant, and transmission fluid.
3
Inspect the gas cap for damage or improper sealing, as a loose cap can trigger the warning light.
4
Examine the air filter for clogging or contamination that may affect engine performance.
5
Test the battery and charging system to ensure they are functioning correctly.
6
Perform a visual inspection of all major engine components for leaks, damage, or wear.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the battery to prevent any electrical shorts during repairs.

2. Address Error Codes

Connect the OBD-II scanner to the diagnostic port.
Record and clear the trouble codes.
If the same code returns after clearing, proceed to the next steps related to the specific code.

3. Replace Faulty Components

If codes indicate a faulty sensor (e.g., O2 sensor, MAF sensor):
- Locate the sensor based on the specific code.
- Disconnect the wiring harness and remove the sensor using the appropriate socket.
- Install the new sensor and reconnect the wiring harness.
If the gas cap is found to be faulty:
- Replace the gas cap with a new one, ensuring it clicks securely when closed.

4. Fluid Changes

If fluid levels are low or contaminated:
- Drain and replace engine oil, using the manufacturer-recommended oil type and viscosity.
- Change the engine air filter if it is dirty.
- Check and change transmission fluid if necessary, following manufacturer specifications.

5. Final Checks

Reconnect the battery.
Start the engine and allow it to idle for a few minutes.
Monitor for any warning lights and ensure the engine runs smoothly.