Code Po102 Question

Mass Airflow (MAF) Circuit Low Voltage Input

• The code P0102 code is often associated with P0100, P0101, P0103 or P0104 trouble codes as they are closely related.

P0102 is the general code for a problem with the Mass Airflow (MAF) Sensor having a low voltage output to the Engine Control Unit (ECU).

The MAF Sensor has low voltage output problems which may have several causes.

• The source of the problem is the sensor range voltage is lower than normal or required by the ECU to function properly.
• The most obvious problem is restricted airflow from the air cleaner to the MAF sensor which can be a clogged air filter.
• The wiring or MAF sensor may be too close to higher voltage consumption components, especially alternators, ignition wires, etc. which can give false readings.
• The MAF sensor can also be dirty or partially plugged with carbon causing a low reading. Many MAF units have screens and they can get clogged up easily, clean using a CRC 05110 spray cleaner.
• MAF sensors must operate within specific ranges to send correct signals for the ECU to adjust correctly for proper engine operation and inputs from other sensors.