Car Problem Reports

Mercedes-Benz 400SE Faulty Mass Air Flow Sensor Causing Erratic Engine Operation and Poor Fuel Economy

 
Mercedes-Benz 400SE Problem
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Model Year Affected: 1992

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A faulty mass air flow (MAF) sensor can cause erratic/rough engine operation and fuel economy issues. Since this sensor measures the actual amount of air entering the motor, when it fails, the engine control module (ECM) takes the wrong information and delivers incorrect volumes of fuel to the cylinders.

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