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my Ford F-150 13th Generation (2015-2020) has a check engine light and it’s flashing - Ford F-150
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my Ford F-150 13th Generation (2015-2020) has a check engine light and it’s flashing

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

Error Codes
2-4 hours
Time
medium
Difficulty
high
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
3 min read
563 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix a flashing check engine light in a 2015-2020 Ford F-150. 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 battery before working on electrical systems.
  • •Allow engine to cool before opening any components.

Symptoms

  • •Flashing check engine light
  • •Engine misfire or rough idling
  • •Loss of power during acceleration
  • •Increased fuel consumption
  • •Unusual engine noises (e.g., knocking or pinging)

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6

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
  • •Multimeter
  • •Spark plug boot puller

Parts Required

  • •Spark plugs
  • •Ignition coils (if faulty)
  • •Fuel filter (if applicable)
  • •Air filter

Additional Information

Affected Component
Engine
Estimated Time
2-4 hours
Difficulty
medium
Severity
high
Tools Required
6 items
Parts Required
4 items

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Solution
1. Preparation
  • Tools Needed: OBD-II scanner, socket set, torque wrench, fuel pressure gauge, multimeter.
  • Ensure the engine is cool and the vehicle is parked on a level surface.
  • Disconnect the negative battery terminal to prevent electrical shock.
2. Address Ignition System Issues

  • Inspect Spark Plugs:

    • Remove the spark plug wires using a spark plug boot puller.
    • Use a socket wrench to remove spark plugs; check for signs of wear or fouling.
    • Replace any faulty spark plugs with OEM or equivalent parts, ensuring correct gap settings.

  • Check Ignition Coils:

    • Remove the ignition coils by unscrewing the bolts and gently pulling them out.
    • Test each ignition coil with a multimeter for resistance; replace any that are out of specification.
3. Fuel System Repair
  • Test Fuel Pressure:
    • Connect the fuel pressure gauge to the fuel rail.
    • Turn the ignition to the "ON" position (do not start) and check the pressure; it should match manufacturer specifications.
    • If pressure is low, check the fuel pump and replace it if necessary.
4. Inspect Air Intake System
  • Check for Blockages:
    • Remove the air intake duct and inspect the air filter for dirt and debris; replace if necessary.
    • Inspect the intake manifold for any signs of leaks or cracks.
5. Exhaust System Examination
  • Look for Leaks:
    • Inspect the exhaust manifold and pipes for signs of rust or holes.
    • If leaks are found, replace the damaged sections of the exhaust system.
6. Reconnect and Test
  • Reconnect the negative battery terminal.
  • Clear any trouble codes with the OBD-II scanner.
  • Start the engine and monitor for any warning lights.