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Mechanical Reasons Why a Car Consumes Too Much Fuel

Model: (Various brands) Various
Part: Checks and maintenance

Video tutorial

In this video, we will explore the mechanical reasons why a car may have excessive fuel consumption: the first is the lambda sensor, which measures the quality of the exhaust gases. If it fails, it cannot perform its job and sends incorrect information to the ECU, which will adjust the fuel mixture accordingly, potentially increasing consumption.

Then there is the mass airflow sensor, located between the air filter box and the intake manifold, which measures how much air is passing through. It also has an electronic board, and if the 'hot wire' that measures the air is damaged, it sends incorrect information, leading to increased consumption.

The same applies to the air filter, and generally for maintenance items like spark plugs. Incorrect information here also leads to increased consumption.

Lastly, consider the tyres, as factors such as the compound, pressure, and alignment can increase friction.


Updated on 26 July 2026 by ScegliAuto


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by ScegliAuto

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