What should I do if my 2021 Ford Explorer won't start?

Ford Explorer Sixth Generation (2020-present)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

4 min read

767 words

Problem Statement

Learn how to diagnose and fix a no-start condition in your 2021 Ford Explorer with detailed steps and required tools.

Affected Component

battery, starter, fuel system

Estimated Time

1-3 hours

Symptoms

•No response when turning the key or pressing the start button.
•Clicking sound from the engine bay.
•Dashboard lights illuminating, but the engine does not crank.
•Engine cranks but does not start (no fuel or spark).

Diagnostic Steps

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

•Multimeter
•Jump starter or jumper cables
•OBD-II scanner
•Screwdrivers (various sizes)
•Wrench set
•Battery terminal cleaner
•Torque wrench (if applicable)
•Safety glasses and gloves

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Solution

If your 2021 Ford Explorer won't start, it can be due to various factors, such as a dead battery, faulty starter, or fuel system issues. Below are detailed steps to diagnose and potentially fix the problem.

Tools Required

Multimeter
Jump starter or jumper cables
OBD-II scanner
Screwdrivers (various sizes)
Wrench set
Battery terminal cleaner
Torque wrench (if applicable)
Safety glasses and gloves

Step 1: Check Battery Condition

Visual Inspection: Open the hood and visually inspect the battery. Look for any corrosion on the terminals, loose connections, or cracks in the battery case.
Voltage Test: Use a multimeter to measure the battery voltage. A healthy battery should read between 12.4V and 12.7V. If it's below 12.0V, consider charging or replacing the battery.
Jump Start: If the battery voltage is low, attempt to jump-start the vehicle using a jump starter or jumper cables connected to another vehicle. If it starts, the battery or charging system may be faulty.

Step 2: Check for Electrical Issues

Fuses: Locate the fuse box (usually beneath the dashboard or in the engine compartment) and check for blown fuses related to the ignition and starter systems.
Wiring Inspection: Inspect the wiring harnesses connected to the battery, starter, and ignition system for any fraying or damage.

Step 3: Test the Starter Motor

Starter Relay Check: Use the multimeter to check the starter relay located in the fuse box. Make sure it is functioning correctly; you can swap it with another relay of the same type to test.
Starter Voltage Test: If you can access the starter, use the multimeter to check for voltage at the starter motor when the key is turned to the start position. You should see battery voltage (around 12V). If there is no voltage, the issue may lie in the ignition switch or wiring.

Step 4: Check Fuel System

Fuel Pump Operation: Turn the ignition to the "ON" position (without starting) and listen for the fuel pump noise. It should run for a few seconds. If you don’t hear it, the fuel pump might be malfunctioning.
Fuel Pressure Test: If you have the right tools, connect a fuel pressure gauge to the fuel rail test port and check if the fuel pressure is within specifications (usually around 30-60 PSI for many vehicles).

Step 5: Scan for Diagnostic Trouble Codes (DTCs)

OBD-II Scanner: Connect an OBD-II scanner to the vehicle’s diagnostic port. Check for any stored trouble codes that may indicate why the vehicle won't start.
Interpret Codes: Look up any codes that appear and follow the troubleshooting steps indicated for those codes.

Repair Instructions

If the Battery is Dead

Charge or Replace Battery: If the battery is found to be faulty, remove it using a wrench to disconnect the negative terminal first, followed by the positive terminal. Replace with a new battery and connect the terminals in reverse order (positive first).
Clean Terminals: If corrosion is present, clean the terminals with a battery terminal cleaner before reassembly.

If the Starter Motor is Faulty

Remove the Starter: Disconnect the negative battery terminal. Unbolt and remove the starter motor from its mounting (usually two or three bolts). Disconnect the wiring harness from the starter.
Install New Starter: Replace with a new starter, ensuring proper alignment and securing with the specified torque. Reconnect the wiring harness and reconnect the battery.

If the Fuel Pump is Malfunctioning

Access Fuel Pump: If necessary, drop the fuel tank to access the fuel pump, or remove the access panel if available.
Replace Fuel Pump: Disconnect the fuel lines and electrical connectors. Remove and replace with a new fuel pump, making sure to secure everything properly and reconnect the battery.

If Issues Persist

Professional Help: If you've followed all these steps and the vehicle still won't start, it may be time to consult a professional mechanic for further diagnosis.

Conclusion

Diagnosing a no-start condition in your 2021 Ford Explorer involves checking the battery, starter, and fuel system. Following the above steps methodically will help you identify and potentially resolve the issue. Always prioritize safety and consult a professional if you're unsure about any step in the process.