my Ford Explorer's diesel exhaust fluid (AdBlue) light is on what does it mean

Ford Explorer Sixth Generation (2020-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

431 words

Problem Statement

Learn how to diagnose and fix the AdBlue warning light issue in your Ford Explorer. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Exhaust System

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Allow the engine to cool before performing any checks under the hood.
•Handle AdBlue fluid with care, as it can cause irritation to skin and eyes.

Symptoms

•AdBlue warning light illuminated on the dashboard
•Reduced engine power or performance
•Engine may enter limp mode
•Possible increased emissions
•Check engine light may also be illuminated

Diagnostic Steps

1
Check the AdBlue fluid level in the reservoir.
2
Scan the vehicle's OBD-II system for any error codes related to the AdBlue system.
3
Inspect the AdBlue injection system for leaks or damage.
4
Check for any blockages in the AdBlue lines or nozzle.
5
Test the AdBlue quality with a refractometer or by checking for crystallization.

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
•Basic hand tools (socket set, screwdrivers)
•Refractometer (optional)

Parts Required

•AdBlue fluid
•AdBlue injector (if faulty)

Related Faults

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Diagnostic Steps

1
Check the AdBlue fluid level in the reservoir.
2
Scan the vehicle's OBD-II system for any error codes related to the AdBlue system.
3
Inspect the AdBlue injection system for leaks or damage.
4
Check for any blockages in the AdBlue lines or nozzle.
5
Test the AdBlue quality with a refractometer or by checking for crystallization.

Solution

1. Preparation

Gather tools and materials including an OBD-II scanner, AdBlue fluid, and basic hand tools.
Ensure the vehicle is parked on a level surface and the engine is turned off.

2. Check AdBlue Fluid Level

Open the hood and locate the AdBlue reservoir.
Remove the cap and visually inspect the fluid level.
- If the level is low, fill with the appropriate AdBlue fluid until it reaches the recommended level.
Replace the cap securely.

3. Reset the Warning Light

Use the OBD-II scanner to check for any stored trouble codes.
If codes are present, clear them after addressing any underlying issues.
Disconnect the OBD-II scanner and start the engine.
Verify that the AdBlue warning light has been reset.

4. Inspect and Repair System Faults

If the warning light remains on after refilling, inspect the AdBlue injector for clogs.
Clean or replace the injector if necessary.
Check the AdBlue lines for leaks or damage; replace any compromised hoses.