why does my Ford F-150 13th Generation (2015-2020) check engine light keep coming on

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

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

602 words

Problem Statement

Learn how to diagnose and fix the check engine light issue in Ford F-150 13th Generation (2015-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool down before inspecting components to avoid burns.

Symptoms

•Check engine light illuminated
•Rough idle or engine misfire
•Decreased fuel economy
•Unusual noises from the engine
•Failed emissions test
•Engine stalling or hesitation during acceleration

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific trouble codes.
2
Inspect the gas cap for proper sealing; a loose or damaged cap can trigger the check engine light.
3
Check engine oil and coolant levels to ensure they are within normal ranges.
4
Inspect ignition components, including spark plugs and ignition coils, for wear or damage.
5
Test the fuel system pressure using a fuel pressure gauge to ensure it meets specifications.
6
Examine the exhaust system for leaks or blockages that could affect emissions.

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
•Fuel pressure gauge
•Wrench set

Parts Required

•O2 sensor (if indicated by codes)
•Ignition coils (if required)
•Spark plugs (if worn)
•Fuel filter (if necessary)

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 specific trouble codes.
2
Inspect the gas cap for proper sealing; a loose or damaged cap can trigger the check engine light.
3
Check engine oil and coolant levels to ensure they are within normal ranges.
4
Inspect ignition components, including spark plugs and ignition coils, for wear or damage.
5
Test the fuel system pressure using a fuel pressure gauge to ensure it meets specifications.
6
Examine the exhaust system for leaks or blockages that could affect emissions.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the battery to prevent electrical shorts while working on the vehicle.
Safety goggles and gloves should be worn for protection.

2. Address Fault Codes

Based on the OBD-II scan results, address the specific fault codes.
- For example, if the code indicates a faulty O2 sensor:
  1. Locate the O2 sensor using the vehicle's service manual.
  2. Disconnect the electrical connector from the sensor.
  3. Use a wrench to remove the sensor from the exhaust pipe.
  4. Install the new O2 sensor and reconnect the electrical connector.

3. Inspect and Replace Ignition Components

If misfire codes are present:
1. Remove the engine cover (if applicable) and access the ignition coils.
2. Disconnect the wiring harness from each ignition coil.
3. Remove the bolts securing the coils and extract them from the spark plugs.
4. Inspect spark plugs for wear; replace if necessary with OEM parts.
5. Install new ignition coils (if required) and reconnect the wiring harness.

4. Fuel System Inspection

If fuel pressure issues are indicated:
1. Locate the fuel rail and attach the fuel pressure gauge.
2. Turn the ignition to the "On" position (do not start) to check pressure.
3. Compare pressure readings with manufacturer specifications.
4. If pressure is low, check the fuel pump and fuel filter for clogs and replace as necessary.

5. Exhaust System Check

For exhaust leaks:
1. Visually inspect the exhaust system from the engine to the tailpipe.
2. Use a smoke machine or soapy water to identify leaks at joints and connections.
3. Repair or replace any damaged sections of the exhaust system.