Discover how to read the check engine light on your 2016 Ford Explorer using an OBD2 scanner or built-in diagnostic mode. This guide walks you through every step to decode error codes, understand what they mean, and take the right action.
Key Takeaways
- Use an OBD2 scanner: The most reliable way to read check engine light codes on a 2016 Ford Explorer is with an OBD2 scanner. It plugs into the diagnostic port and retrieves precise trouble codes.
- Locate the OBD2 port: The port is usually under the dashboard, near the driver’s side footwell. It’s a 16-pin connector that’s easy to access once you know where to look.
- Understand OBD2 codes: Codes like P0301 mean a misfire in cylinder 1. Knowing the format (P, B, C, U + numbers) helps you interpret issues quickly.
- Try the key dance method: If you don’t have a scanner, you can use the “key dance” method to flash the check engine light and read basic codes—though it’s less accurate.
- Don’t ignore the light: Even if the car runs fine, a check engine light can signal serious problems like emissions issues or engine damage if left unchecked.
- Clear codes after repairs: Once the issue is fixed, use the scanner to clear the code and reset the light. If it stays off, the problem is resolved.
- Consult a mechanic for complex issues: Some codes require professional diagnosis and repair, especially those related to the transmission or emissions system.
How to Read Check Engine Light on 2016 Ford Explorer
Seeing the check engine light pop up on your 2016 Ford Explorer can be stressful. Is it something minor like a loose gas cap, or a sign of a serious engine problem? The good news is that you don’t need to panic—or rush to the mechanic—right away. With the right tools and a little know-how, you can read the check engine light yourself and get a clear idea of what’s going on under the hood.
In this guide, we’ll walk you through everything you need to know about reading the check engine light on your 2016 Ford Explorer. You’ll learn how to use an OBD2 scanner, where to find the diagnostic port, how to interpret trouble codes, and even how to try a manual method if you don’t have a scanner handy. By the end, you’ll feel confident diagnosing common issues and deciding whether you can fix them yourself or need professional help.
Why the Check Engine Light Comes On
The check engine light—also known as the malfunction indicator lamp (MIL)—is part of your vehicle’s onboard diagnostic system. It monitors everything from engine performance to emissions and fuel efficiency. When the system detects a problem, it triggers the light to alert you.
Visual guide about How to Read Check Engine Light on 2016 Ford Explorer
Image source: cdn.carcomplaints.com
Common reasons the check engine light comes on in a 2016 Ford Explorer include:
- A loose or faulty gas cap
- Oxygen sensor failure
- Spark plug or ignition coil issues
- Catalytic converter problems
- Mass airflow sensor malfunction
- Evaporative emissions system leaks
Some of these issues are easy and inexpensive to fix, while others may require more advanced repairs. The key is to read the code quickly so you can take action before a small problem becomes a big one.
What You’ll Need to Read the Check Engine Light
Before you start, make sure you have the right tools. Here’s what you’ll need:
- OBD2 scanner: This is the best tool for reading check engine light codes. You can buy one online or at an auto parts store for as little as $20. Look for a basic code reader or a more advanced Bluetooth model that works with your smartphone.
- Access to the OBD2 port: This is a 16-pin connector usually located under the dashboard. We’ll show you exactly where to find it.
- Your vehicle’s ignition key: You’ll need this to turn the key to the “on” position without starting the engine.
- A notepad or phone: To write down the trouble code(s) so you can look them up later.
If you don’t have an OBD2 scanner, don’t worry—we’ll also cover a manual method called the “key dance” that can help you read basic codes using just the dashboard lights.
Step 1: Locate the OBD2 Port
The first step in reading the check engine light is finding the OBD2 (On-Board Diagnostics, Generation 2) port. This is the connection point where your scanner communicates with the vehicle’s computer.
Where to Find the OBD2 Port on a 2016 Ford Explorer
In the 2016 Ford Explorer, the OBD2 port is typically located under the dashboard on the driver’s side. It’s usually within arm’s reach when you’re sitting in the driver’s seat.
To find it:
- Sit in the driver’s seat and look down near the footwell.
- Look for a rectangular-shaped connector with 16 pins inside. It’s often black or gray and may be tucked behind a small panel or cover.
- If you can’t see it right away, check just above the pedals or slightly to the left of the steering column.
In some models, the port might be hidden behind a small plastic cover. If so, gently pull the cover off to reveal the connector. The port should be clearly labeled “OBD2” or “Diagnostics” in some cases.
Tip: Use a Flashlight
If the area is dark or cluttered, use a flashlight to help you spot the port. It’s easy to miss if you’re not looking carefully.
Step 2: Connect the OBD2 Scanner
Once you’ve located the OBD2 port, it’s time to connect your scanner.
How to Plug In the Scanner
- Make sure your vehicle is turned off.
- Take your OBD2 scanner and align the connector with the port. The shape is designed to fit only one way, so don’t force it.
- Gently push the scanner into the port until it clicks or feels secure.
- Some scanners have a power button—turn it on now. Others will power up automatically when connected.
Turn the Ignition On
With the scanner connected, turn the ignition key to the “on” position. Do not start the engine—just turn it so that the dashboard lights up. This gives the scanner power and allows it to communicate with the vehicle’s computer.
You should see the scanner’s screen light up. If it doesn’t, double-check the connection and make sure the ignition is on.
Step 3: Read the Trouble Codes
Now that your scanner is connected and powered, it’s time to retrieve the trouble codes.
Follow the Scanner’s Instructions
Most basic OBD2 scanners have a simple menu. Here’s what to do:
- Press the “Read” or “Scan” button on the device.
- Wait a few seconds while the scanner communicates with the vehicle’s computer.
- The screen will display one or more trouble codes, usually in the format PXXXX (e.g., P0301).
Write Down the Codes
Write down every code that appears. Even if there’s only one, it’s good to have a record. Some scanners can store codes or send them to your phone via Bluetooth, which is even more convenient.
Example Codes You Might See
- P0300: Random/multiple cylinder misfire detected
- P0301: Cylinder 1 misfire
- P0420: Catalyst system efficiency below threshold
- P0171: System too lean (bank 1)
- P0455: Evaporative emission system leak detected (large leak)
These codes give you a starting point for diagnosing the issue. The first letter tells you the system involved:
- P: Powertrain (engine, transmission)
- B: Body (airbags, climate control)
- C: Chassis (ABS, steering)
- U: Network/communication
The numbers that follow provide more detail about the specific problem.
Step 4: Interpret the Trouble Codes
Once you have the codes, the next step is understanding what they mean.
Use a Code Lookup Tool
You can look up OBD2 codes in several ways:
- Check the manual that came with your scanner—many include a code reference guide.
- Use a free online OBD2 code database like OBD-Codes.com or Engine-Codes.com.
- Download a mobile app like Torque Pro (Android) or OBD Fusion (iOS) that explains codes in plain language.
Example: What Does P0301 Mean?
If your scanner shows P0301, it means there’s a misfire in cylinder 1. This could be caused by a bad spark plug, faulty ignition coil, or fuel delivery issue. It’s a common problem and often fixable with basic tools.
Don’t Jump to Conclusions
While trouble codes are helpful, they don’t always tell the whole story. For example, a P0420 code (catalytic converter issue) might actually be caused by a bad oxygen sensor. That’s why it’s important to research the code and consider other symptoms—like poor fuel economy or rough idling—before replacing parts.
Step 5: Try the Key Dance Method (No Scanner Needed)
If you don’t have an OBD2 scanner, you can still get a rough idea of the problem using the “key dance” method. This technique uses the check engine light to flash codes, but it only works on older vehicles and may not be reliable on all 2016 models. Still, it’s worth a try in a pinch.
How to Perform the Key Dance
- Turn the ignition key to the “off” position.
- Press and hold the trip odometer reset button (usually on the instrument cluster).
- While holding the button, turn the key to the “on” position (do not start the engine).
- Keep holding the button for about 10–15 seconds until the odometer displays “DIAG” or “TEST.”
- Release the button and watch the check engine light.
Read the Flashing Pattern
The check engine light will begin to flash in a pattern that represents the trouble code. For example:
- A long flash = 10
- A short flash = 1
- Two long flashes followed by three short flashes = 23 (P0023)
Count the flashes and write down the number. Then look up the corresponding code online.
Limitations of the Key Dance Method
This method is not always accurate on 2016 Ford Explorers, as newer vehicles often require a scanner for full diagnostics. It may only show generic codes or fail to work at all. Still, it’s a free option if you’re stranded without tools.
Step 6: Clear the Codes and Reset the Light
After diagnosing the issue and making repairs, you’ll want to clear the trouble codes and turn off the check engine light.
How to Clear Codes with a Scanner
- Reconnect your OBD2 scanner to the port.
- Turn the ignition to the “on” position.
- Navigate to the “Clear Codes” or “Erase DTCs” option on the scanner.
- Confirm the action when prompted.
- The scanner will reset the system and turn off the check engine light.
What If the Light Comes Back On?
If the check engine light returns after clearing the code, it means the problem wasn’t fully resolved. The vehicle’s computer has detected the same issue again. In this case, double-check your repairs or consult a mechanic.
Don’t Clear Codes Before Diagnosis
Never clear codes before reading them. If you erase the codes without diagnosing the problem, you’ll lose valuable information and may have to wait for the light to come back on.
Common Issues and Fixes for the 2016 Ford Explorer
Based on common trouble codes, here are some typical problems and solutions for the 2016 Ford Explorer:
1. Loose or Faulty Gas Cap (P0455, P0457)
This is one of the most common causes of the check engine light. The gas cap seals the fuel system, and if it’s loose, damaged, or missing, it can trigger an evaporative emissions leak code.
- Fix: Tighten the gas cap or replace it if cracked or worn. After replacing, drive for a few days to see if the light turns off.
2. Oxygen Sensor Failure (P0135, P0141)
The oxygen sensor monitors exhaust gases and helps the engine adjust the air-fuel mixture. A faulty sensor can reduce fuel efficiency and increase emissions.
- Fix: Replace the faulty oxygen sensor. This is a moderate repair that may require special tools.
3. Ignition Coil or Spark Plug Issues (P0300–P0306)
Misfire codes often point to problems with spark plugs or ignition coils. Over time, these components wear out and cause rough idling or poor acceleration.
- Fix: Replace the spark plugs and/or ignition coils. Use OEM or high-quality aftermarket parts for best results.
4. Mass Airflow Sensor Problems (P0101, P0102)
The MAF sensor measures how much air enters the engine. If it’s dirty or faulty, the engine may run rich or lean.
- Fix: Clean the MAF sensor with MAF cleaner spray, or replace it if damaged.
5. Catalytic Converter Issues (P0420)
A failing catalytic converter can cause poor performance and increased emissions. This is often a result of long-term engine problems like misfires.
- Fix: Replace the catalytic converter. This is a costly repair, so confirm the diagnosis with a mechanic.
When to See a Mechanic
While many check engine light issues can be handled at home, some require professional attention. See a mechanic if:
- The check engine light is flashing (this indicates a severe misfire that can damage the catalytic converter).
- You’re unsure how to interpret or fix the code.
- The problem involves the transmission, ABS, or airbag system.
- You’ve tried basic fixes but the light keeps coming back.
A certified Ford technician has access to advanced diagnostic tools and factory service information, which can save you time and money in the long run.
Tips for Maintaining Your 2016 Ford Explorer
Prevent future check engine light issues with regular maintenance:
- Replace spark plugs and ignition coils at recommended intervals (usually every 60,000–100,000 miles).
- Use high-quality fuel and keep the gas cap tight.
- Replace the air filter and cabin air filter regularly.
- Get regular oil changes and use the correct oil type.
- Scan for codes periodically, even if the light isn’t on, to catch issues early.
Conclusion
Reading the check engine light on your 2016 Ford Explorer doesn’t have to be intimidating. With an OBD2 scanner and a little patience, you can quickly diagnose common problems and decide whether to fix them yourself or visit a mechanic. Remember to always read the codes before clearing them, and don’t ignore a flashing light—it could signal serious engine damage.
By following this guide, you’ll save time, reduce stress, and keep your Explorer running smoothly for years to come. Whether you’re dealing with a loose gas cap or a misfiring cylinder, knowing how to read the check engine light puts you in control.