This typically results in:
* Reduced power: The engine will feel sluggish and may not accelerate normally. You might only be able to reach a lower maximum speed.
* Limited RPM: The engine might not rev past a certain point.
* Altered shift points (automatic transmission): The transmission might shift earlier than usual to keep the engine RPMs low.
* Check Engine Light (CEL): The CEL will almost certainly be illuminated, indicating a fault has been detected.
The specific limitations imposed will depend on the nature of the problem the PCM has detected. It's a safety measure, but it's not a permanent solution. You must have the vehicle diagnosed by a mechanic to determine the underlying cause. Ignoring the problem could lead to more serious and costly repairs.
Possible causes of engine fail-safe mode in a 4.0L V6 Ford Explorer are numerous, and can include issues with:
* Sensors: Oxygen sensors, mass airflow sensor, crankshaft position sensor, camshaft position sensor, etc. These sensors provide crucial information to the PCM, and a faulty sensor can trigger fail-safe mode.
* Ignition system: Problems with spark plugs, ignition coils, or the distributor (if equipped) can cause misfires and trigger fail-safe mode.
* Fuel system: Issues with the fuel pump, fuel injectors, or fuel pressure regulator can also lead to reduced engine performance and fail-safe mode.
* Exhaust system: A severely clogged catalytic converter can restrict exhaust flow, impacting engine performance and triggering fail-safe mode.
In short: Driving in fail-safe mode is not ideal. Get your Explorer to a mechanic as soon as possible for diagnosis and repair. Continuing to drive with a fault could cause further damage.
