RELATED: 8 Symptoms of a Bad MAF Sensor (& Replacement Cost) 2.
For example, some of the most popular include P0100: MAF circuit malfunction, P0101: MAF circuit range/performance, P0102: MAF circuit low input, P0103: MAF circuit high input and P0104: MAF circuit intermittent. Thankfully, you can check the codes with your OBDII scanner.ĭepending on what kind of car you drive, you might see a variety of codes. When the mass air flow sensor fails to send the right signals to the ECM, the Check Engine Light will come on.
Reasons to Clean the Mass Air Flow Sensor 1. However, the AFR varies based on the manufacturer. This means the engine utilizes 14.7 pounds of air for every one pound of fuel. With most engines, 14.7:1 is the appropriate ratio. The ECM uses this information to decide how much fuel must be added to ensure a perfectly balanced air-fuel ratio. The mass air flow sensor is meant to measure how much air mass is flowing into the engine intake. Both of these are sent to the ECM, where the air-fuel ratio is regulated carefully.
Many modern MAF sensors also have the intake air temperature (IAT) sensor built in.ĭigital mass air flow sensors utilize a frequency output, while the analog MAF sensor produces variable voltage output. This component is located between the intake manifold on the engine and the air filter. It’s part of the car’s electronic fuel injection system. The mass air flow sensor is otherwise referred to as the MAF.
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