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my Ford F-150's check engine light is flashing what should I do - Ford F-150
Home/Cars/Ford/F-150/13th Generation (2015-2020)/my Ford F-150's check engine light is flashing what should I do

my Ford F-150's check engine light is flashing what should I do

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

Error Codes
2-4 hours
Time
medium
Difficulty
high
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
3 min read
572 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 on your 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 the battery before working on electrical systems.
  • •Allow the engine to cool before starting any repairs.

Symptoms

  • •Check engine light is flashing
  • •Engine misfire or rough idling
  • •Decreased fuel efficiency
  • •Loss of power during acceleration
  • •Unusual engine noises (e.g., knocking or popping)

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
  • •Throttle body cleaner

Parts Required

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

Additional Information

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

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Solution
1. Preparation
  • Gather tools and parts needed for the repair.
  • Disconnect the battery to ensure safety while working on electrical components.
2. Address Ignition Issues
  • Sub-step 1: Remove the engine cover (if applicable) using a socket set.
  • Sub-step 2: Carefully remove the ignition coils by unscrewing them and disconnecting the electrical connectors.
  • Sub-step 3: Inspect and replace any faulty spark plugs with new ones, ensuring proper gap settings as per manufacturer specifications (usually around 0.054 inches for F-150).
  • Sub-step 4: Reinstall the ignition coils, ensuring they are seated correctly and reattach the connectors.
3. Check Fuel System
  • Sub-step 1: Inspect the fuel filter and replace it if clogged (follow manufacturer specifications for location and replacement procedure).
  • Sub-step 2: Test the fuel pressure with a fuel pressure gauge to ensure it's within the recommended range (usually 30-45 psi for F-150).
  • Sub-step 3: If pressure is low, check the fuel pump operation and replace if necessary.
4. Inspect Air Intake and Vacuum Lines
  • Sub-step 1: Remove the air intake duct and inspect the air filter; replace if dirty.
  • Sub-step 2: Check the throttle body for carbon build-up and clean it with throttle body cleaner.
  • Sub-step 3: Inspect vacuum lines for any cracks or loose connections and replace or reconnect as needed.
5. Reassemble and Test
  • Sub-step 1: Reconnect the battery.
  • Sub-step 2: Start the engine and monitor for any unusual sounds or issues.
  • Sub-step 3: Clear any error codes using the OBD-II scanner and take the vehicle for a test drive to ensure the check engine light does not return.