why is my Ford Explorer check engine light on after changing oil

Ford Explorer Fifth Generation (2011-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

490 words

Problem Statement

Learn how to diagnose and fix the check engine light issue after an oil change in Ford Explorer. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Engine

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical systems.
•Allow engine to cool before inspecting or changing oil components.

Symptoms

•Check engine light illuminated
•Possible oil leaks or low oil pressure
•Engine running rough or misfiring
•Unusual engine noises (ticking, knocking)
•Decreased fuel efficiency
•Oil change reminder still active on the dashboard

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific trouble codes.
2
Check the engine oil level and inspect for oil leaks around the oil filter and drain plug.
3
Inspect the oil filter to ensure it is properly installed and not leaking.
4
Verify that the correct oil type and viscosity were used during the oil change.
5
Check for loose or disconnected electrical connectors, especially related to the engine and oil pressure sensors.
6
Monitor engine performance for any unusual behavior or noises.

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
•Oil filter wrench
•Torque wrench

Parts Required

•Engine oil (correct type and viscosity)
•Oil filter (if faulty)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific trouble codes.
2
Check the engine oil level and inspect for oil leaks around the oil filter and drain plug.
3
Inspect the oil filter to ensure it is properly installed and not leaking.
4
Verify that the correct oil type and viscosity were used during the oil change.
5
Check for loose or disconnected electrical connectors, especially related to the engine and oil pressure sensors.
6
Monitor engine performance for any unusual behavior or noises.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and engine is off.
Disconnect the battery negative terminal for safety.

2. Inspect and Reconnect Components

Inspect Electrical Connections:
- Check all electrical connectors related to the engine, especially the oil pressure sensor.
- Reconnect any loose or disconnected wiring harnesses.
Inspect Oil Filter:
- Remove the oil filter if it is suspected to be leaking.
- Check the rubber gasket for damage; replace if necessary.
- Ensure the oil filter is the correct part number and re-install it properly.

3. Check and Correct Oil Levels

Check Oil Level:
- Use the dipstick to check the engine oil level.
- If low, add the correct type of oil as specified in the owner’s manual.

4. Reset Check Engine Light

Reset the OBD-II System:
- Use the OBD-II scanner to clear any trouble codes and reset the check engine light.
- Reconnect the battery terminal.