Drop in Fuel Economy
A recent drop in fuel economy in a 2020 Ford Explorer can be caused by several factors, ranging from simple maintenance issues to more complex sensor or system failures. Common causes include underinflated tires, a dirty air filter, faulty oxygen sensors, or a malfunctioning mass airflow sensor.
Diagnosis Details
Possible Causes
Underinflated tires or improper tire pressure
Dirty or clogged engine air filter
Faulty oxygen sensor (O2 sensor) causing rich fuel mixture
Malfunctioning mass airflow (MAF) sensor
Fuel injector issues or fuel system leak
Driving habits or increased idling
Related OBD-II Codes
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What You Should Do
Check and adjust tire pressures to recommended levels.
Inspect and replace the engine air filter if dirty.
Have the oxygen sensors and mass airflow sensor tested with a scan tool.
Consider a fuel system cleaning if injectors are suspected.
Monitor driving habits for changes.
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Disclaimer: This AI-generated diagnosis is for informational reference only. Always consult a qualified mechanic for an in-person inspection. AutOwner is not responsible for decisions made based on this information.
