Here's the proper procedure:
1. Safety First: Pull over safely to the side of the road as soon as it's safe to do so. Do not continue driving in fail-safe mode.
2. Check the Engine Light: The Check Engine light (usually an orange or yellow icon) will likely be illuminated. Note any other warning lights that might be on (like the ABS, traction control, or battery lights).
3. Obtain Diagnostic Codes: You need to retrieve the Diagnostic Trouble Codes (DTCs) stored in your vehicle's computer. You can do this in a few ways:
* OBD-II Scanner: The most reliable method is using an OBD-II scanner (available at most auto parts stores). These scanners will read the codes and often provide descriptions of what they mean. Many inexpensive scanners are available, but a more advanced one can give more detailed information.
* Auto Parts Store: Many auto parts stores will scan your vehicle for free. They can read the codes and sometimes give you a preliminary diagnosis.
* Mechanic: Take your Explorer to a qualified mechanic. This is the recommended approach, especially if you're not comfortable working on your vehicle yourself.
4. Address the Underlying Problem: Once you have the DTCs, you'll know what the potential problem is. The codes will point towards specific sensors, components, or systems that are malfunctioning. This information is crucial for determining the appropriate repair. Some common causes of engine fail-safe mode in Explorers include:
* Mass Airflow Sensor (MAF) issues: A dirty or faulty MAF sensor can cause inaccurate air readings, leading to engine problems.
* Throttle Position Sensor (TPS) problems: A faulty TPS prevents the engine from receiving accurate throttle position data.
* Camshaft Position Sensor (CMP) or Crankshaft Position Sensor (CKP) problems: These sensors are essential for engine timing, and failure can lead to significant issues.
* Problems within the PCM (Powertrain Control Module): While less common, problems within the computer itself can also trigger fail-safe mode.
* Low fuel pressure: A clogged fuel filter or failing fuel pump can cause this.
Do NOT:
* Ignore the problem: Continuing to drive with the engine in fail-safe mode can cause further damage.
* Try to "fix" it without knowing the cause: Guessing at the problem could lead to wasted time and money, and potentially more damage.
* Clear the codes without fixing the problem: Clearing the codes will only temporarily remove the warning light. The underlying issue will still exist.
In short, getting a proper diagnosis is paramount. Take your Ford Explorer to a mechanic or use an OBD-II scanner to obtain the diagnostic trouble codes before attempting any repairs. The fail-safe mode is a warning sign that something serious is wrong.
