how to diagnose a Ford Explorer Sixth Generation (2020-present) that cranks but won’t start

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

552 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 the no-start issue in Ford Explorer Sixth Generation. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Fuel System

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems
•Allow engine components to cool before handling to prevent burns

Symptoms

•Engine cranks but does not start
•No fuel delivery detected
•Check engine light may be illuminated
•Unusual sounds from the fuel pump
•Security light illuminated on the dashboard
•No response from the throttle when the accelerator pedal is pressed

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for stored diagnostic trouble codes (DTCs)
2
Verify battery voltage with a multimeter to ensure it is above 12.4 volts
3
Check the fuel pump operation by turning the ignition key to the 'ON' position and listening for the fuel pump priming sound
4
Inspect the fuel pressure using a fuel pressure gauge to ensure it meets the manufacturer's specifications
5
Test the ignition system components, including spark plugs and ignition coils, for proper operation
6
Check the fuses related to the fuel and ignition systems for continuity
7
Verify the status of the immobilizer system and ensure the key is recognized by the vehicle

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
•Fuel pressure gauge
•Socket set
•Torque wrench

Parts Required

•Fuel pump (if faulty)
•Ignition coils (if faulty)
•Spark plugs (if worn)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for stored diagnostic trouble codes (DTCs)
2
Verify battery voltage with a multimeter to ensure it is above 12.4 volts
3
Check the fuel pump operation by turning the ignition key to the 'ON' position and listening for the fuel pump priming sound
4
Inspect the fuel pressure using a fuel pressure gauge to ensure it meets the manufacturer's specifications
5
Test the ignition system components, including spark plugs and ignition coils, for proper operation
6
Check the fuses related to the fuel and ignition systems for continuity
7
Verify the status of the immobilizer system and ensure the key is recognized by the vehicle

Solution

1. Preparation

Gather tools and parts required.
Disconnect the negative battery terminal to prevent electrical shorts.
Ensure the work area is well-ventilated and free of flammable materials.

2. Fuel System Check

Sub-step 1: Reconnect the battery, turn the ignition to the "ON" position (do not start), and listen for the fuel pump priming sound.
Sub-step 2: If no sound is heard, check the fuel pump relay and fuse. Replace if faulty.
Sub-step 3: If the fuel pump operates, connect a fuel pressure gauge to the fuel rail and turn the key to "ON" to measure pressure.
- Note: Fuel pressure should be within the manufacturer's specifications (typically around 50-60 PSI).

3. Ignition System Inspection

Sub-step 1: Remove the spark plugs using a socket set and inspect for wear or damage.
Sub-step 2: Use a multimeter to test the ignition coils' resistance according to the manufacturer's specifications.
Sub-step 3: If any components are faulty, replace them with new parts.

4. Check for Security System Issues

Sub-step 1: Verify that the key fob is functioning and the battery is not dead.
Sub-step 2: If the security light is illuminated, attempt to reset the immobilizer by following the manufacturer’s procedure for reprogramming the key.