- A faulty oxygen sensor can report wrong information about the amount of oxygen in the exhaust, leading to incorrect air/fuel mixture calculations and increased fuel consumption.
2. Faulty Fuel Pressure Regulator:
- A malfunctioning fuel pressure regulator can cause excess fuel to be supplied to the engine, resulting in higher fuel usage.
3. Leaking Fuel Injectors:
- Leaky fuel injectors can drip fuel into the engine, even when closed, causing fuel wastage and higher consumption.
4. Clogged Air Filter:
- A blocked air filter restricts airflow to the engine, affecting fuel efficiency and causing higher fuel usage to achieve the same performance.
5. Engine Coolant Temperature Sensor Failure:
- A faulty coolant temperature sensor can provide incorrect readings to the engine's computer, resulting in an incorrect fuel mixture and higher fuel consumption.
6. Dirty or Worn Spark Plugs:
- Worn or dirty spark plugs can hinder proper combustion, leading to incomplete fuel burn and reduced efficiency, causing increased fuel usage.
7. Faulty Idle Control Valve (ICV):
- A faulty ICV can lead to incorrect engine idling speed, affecting the fuel-to-air ratio and causing increased fuel consumption.
8. Lack of Regular Vehicle Maintenance:
- General maintenance neglect, such as not changing oil and fluids, can impact the overall performance of the vehicle, including increased fuel consumption.
9. Tire Pressure Issues:
- Underinflated tires create more rolling resistance, requiring the engine to work harder and, in turn, consume more fuel.
10. Driving Habits:
- Aggressive driving, such as rapid acceleration and braking, can contribute to higher fuel usage.
