my Ford F-150 13th Generation (2015-2020) engine light is on but car runs fine

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

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

481 words

Problem Statement

Learn how to diagnose and fix the engine light issue on your Ford F-150 (2015-2020). Step-by-step guide with symptoms, diagnostic steps, and solutions.

Affected Component

Engine

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical components.
•Ensure the engine is cool before inspecting any components to avoid burns.

Symptoms

•Check engine light illuminated
•No noticeable changes in engine performance
•No rough idling or stalling
•No loss of power during acceleration
•No unusual noises from the engine

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored codes.
2
Inspect the gas cap for proper sealing and any signs of damage.
3
Check for any obvious vacuum leaks in the intake system.
4
Review the vehicle’s maintenance history for recent repairs or changes.
5
Inspect the engine coolant temperature sensor for proper operation.
6
Check the battery voltage and connections to rule out electrical issues.

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
•Basic hand tools (screwdrivers, socket set)
•Smoke machine (optional for vacuum leak detection)

Parts Required

•Replacement gas cap (if necessary)
•Engine coolant temperature sensor (if necessary)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored codes.
2
Inspect the gas cap for proper sealing and any signs of damage.
3
Check for any obvious vacuum leaks in the intake system.
4
Review the vehicle’s maintenance history for recent repairs or changes.
5
Inspect the engine coolant temperature sensor for proper operation.
6
Check the battery voltage and connections to rule out electrical issues.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface.
Disconnect the battery negative terminal to avoid electrical shorts.

2. Scan and Review Codes

Use an OBD-II scanner to retrieve any diagnostic trouble codes (DTCs).
Note any codes and clear them to see if they return.

3. Inspect and Replace Gas Cap (if necessary)

Check the gas cap for cracks or damage.
Tighten the gas cap if it is loose.
If damaged, replace the gas cap with a new one, ensuring it is the correct part for the F-150.

4. Check for Vacuum Leaks

Inspect all vacuum lines visually for cracks or disconnections.
Use a smoke machine or carburetor cleaner to identify leaks in the intake system.
Repair or replace any damaged hoses as necessary.

5. Inspect Engine Coolant Temperature Sensor

Locate the engine coolant temperature sensor.
Disconnect the sensor connector and use a multimeter to test its resistance.
Replace the sensor if it is out of specification.

6. Reconnect Battery and Final Checks

Reconnect the battery negative terminal.
Start the vehicle and let it idle for a few minutes to ensure there are no error codes returned.