![]() ![]() If the sensor doesn't measure the air flow correctly, the fuel injection system won't work properly. The engine computer uses the mass air flow sensor signal to determine how much fuel to inject. In most cases, this code is not very difficult to diagnose. The OBD-II code P0101 is set when the signal from the mass air flow sensor is out of expected range, or in other words, the MAF sensor doesn't work properly. ![]() The mass airflow sensor (MAF) measures the amount of air entering the engine. Signs of automatic transmission problems.How to check the engine when buying a used car.How to get the best deal on a used car?.Buying a Used Car: 10 Common Mistakes to Avoid.
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