why does my Ford Explorer's check engine light come on after oil change

Ford Explorer Fifth Generation (2011-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

537 words

Problem Statement

Learn why your Ford Explorer's check engine light comes on after an oil change. Follow our diagnostic steps and solutions to resolve the issue effectively.

Affected Component

Engine

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before checking oil levels or performing any inspections.

Symptoms

•Check engine light illuminated
•Possible oil leak under the vehicle
•Engine running rough or misfiring
•Decreased fuel efficiency
•Oil pressure warning light may appear
•Unusual noises from the engine bay

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific issues causing the check engine light.
2
Check the oil level and condition to ensure it is at the proper level and not contaminated.
3
Inspect the oil filter and oil drain plug for proper installation and signs of leaks.
4
Examine connections around the engine for any loose or disconnected sensors, especially near the oil filter or engine area.
5
Review maintenance records to confirm the correct oil type and filter were used during the change.

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
•Oil filter wrench

Parts Required

•Oil filter (if leaking or damaged)
•Oil drain plug washer (if leaking)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific issues causing the check engine light.
2
Check the oil level and condition to ensure it is at the proper level and not contaminated.
3
Inspect the oil filter and oil drain plug for proper installation and signs of leaks.
4
Examine connections around the engine for any loose or disconnected sensors, especially near the oil filter or engine area.
5
Review maintenance records to confirm the correct oil type and filter were used during the change.

Solution

1. Preparation

Gather tools: OBD-II scanner, socket set, torque wrench, oil filter wrench.
Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the battery to reset the check engine light if necessary.

2. Check Oil Level and Quality

Remove the dipstick and wipe it clean.
Reinsert the dipstick and remove it again to check the oil level.
If low, add the correct oil type (consult the owner's manual for specifications).
Inspect the oil for milky or sludge-like consistency, indicating potential contamination.

3. Inspect Oil Filter and Drain Plug

Using the oil filter wrench, check if the oil filter is properly tightened and not leaking.
Inspect the oil drain plug for tightness using a socket set; tighten to manufacturer specifications (typically around 20-30 ft-lbs).
If a leak is found, replace the oil filter or drain plug washer as necessary.

4. Check Electrical Connections

Visually inspect wiring and connectors around the oil filter and engine area.
Reconnect any loose connectors and ensure they are secure.
If any damaged wires are found, repair or replace as needed.

5. Reset the Check Engine Light

Using the OBD-II scanner, clear any error codes and reset the check engine light.
Reconnect the battery if it was disconnected prior to this step.