- Low tire pressure: Underinflated tires can increase rolling resistance, which can lead to poor fuel economy.
- Faulty oxygen sensor: A faulty oxygen sensor can cause the engine to run rich, which can lead to poor fuel economy.
- Faulty fuel injector: A faulty fuel injector can cause the engine to run rich, which can lead to poor fuel economy.
- Faulty mass air flow sensor (MAF): A faulty MAF sensor can cause the engine to run rich, which can lead to poor fuel economy.
- Incorrect fuel octane: Using fuel with an octane rating higher than what is recommended by the manufacturer can lead to poor fuel economy.
- Driving habits: Aggressive driving, such as rapid acceleration and braking, can lead to poor fuel economy.
- Driving in hilly or mountainous terrain: Driving in hilly or mountainous terrain can lead to poor fuel economy.
- Idling for long periods of time: Idling for long periods of time can lead to poor fuel economy.
- Excessive weight in the vehicle: Carrying excessive weight in the vehicle can lead to poor fuel economy.
- Faulty spark plugs or wires: Faulty spark plugs or wires can cause the engine to misfire, which can lead to poor fuel economy.
