Mass Air Flow Sensor (2015)
The analog MAF sensor uses a hot wire sensing element to measure the amount of air entering the engine. Air passing over the hot wire causes it to cool. This hot wire is maintained at 200°C (392°F) above the ambient temperature as measured by a constant cold wire. The current required to maintain the temperature of the hot wire is proportional to the mass air flow. The MAF sensor then outputs an analog voltage proportional to the intake air mass.
The MAF sensor is located between the air cleaner and the throttle body or inside the air cleaner assembly. Most MAF sensors have integrated bypass technology with an integrated IAT sensor. The hot wire electronic sensing element must be replaced as an assembly. Replacing only the element may change the air flow calibration.
For the 2011 MY, some vehicles will use a digital MAF sensor, which outputs a frequency proportional to the intake air mass.
| DTCs | Analog Sensor: P0102 (low input), P0103 (high input) Digital Sensor: P0100 (broken element), P0102 (low input), P0103 (high input) |
| Monitor Execution | Continuous |
| Monitor Sequence | None |
| Sensors OK | Not Applicable |
| Monitoring Duration | 5 seconds to register a malfunction |
| Analog Sensor: Voltage < 0.244 volts and engine running or voltage > 4.785 volts engine rpm < 4, 000 rpm Digital Sensor: With engine running, frequency < 750 Hz or frequency = 0 |