It's quite possible that the mass air flow sensor is either contaminated or faulty. However, it's not the only potential problem you are facing. Here are some of the most common P0102 causes. Dirty or faulty mass air flow sensor. Intake air leaks. MAF sensor wiring problem. Dirty air filter. Faulty PCM (unusual)
The mass air flow (MAF) sensor measures the mass flow rate of air entering the engine, and this information is used by the engine control module (ECM) to calculate the amount of fuel needed for the correct air-fuel mixture. Mass air flow sensors are often built into a larger housing that may include a screen to prevent debris to prevent the During the time we were updating our design, we discovered small differences between the stock 2013"2015 and the 2016+ Focus ST intakes. The 2013"2015 Focus ST's have a screw type mass airflow (MAF) sensor that goes into the stock pipe. In the 2016+ model, however, the MAF sensor is replaced with an IAT sensor in the same location and it fits Focus ST ESP system fault. Thread starter collyirwin11; Start date 24 Aug 2016; Status With the MAF unplugged it may either default to MAP reading only for fuelling or to a default safe state which would be rich. So it may be that unplugging the MAF makes it run better but not be the cause of the issue. Location All over the place. 24 . 253 8 160 161 155 446 158 112