Check Technical Service Bulletins (TSB) for your specific make / model for known problems with your vehicle.Use a scan tool to monitor real-time values of MAF sensor, O2 sensors, etc.Check for vacuum leaks after the MAF sensor. Low minimum airflow through the sensor hole can cause this DTC to set at idle or during deceleration. Loss of vacuum at the MAP sensor can trigger this DTC.If there is a mesh in the air intake system, make sure it is clean (mostly VW).Thoroughly clean the MAF with a MAF cleaning spray, usually a good DIY diagnostic / repair step.If the air filter is dirty, replace it with a new original filter from your dealer.Visually * carefully * inspect the MAF (MAF) sensor wires or tape to see contaminants such as dirt, dust, oil, etc.Visually check for obvious air leaks in the air intake system.Visually inspect all MAF wiring and connectors to ensure they are intact, not frayed, broken, routed too close to ignition wires / coils, relays, engines, etc.What can I do to diagnose and fix Engine Code P0102? You may have misfire codes or O2 sensor codes, so it is important to get a “big picture” of how the systems work together and affect each other when diagnosing. Note that other codes may be present if you have a P0102. MAF sensor wiring harness or wiring problem (open circuit, short circuit, wear, poor connection, etc.).Stuck when starting the engine, which can lead to automatic shutdown.Feeling of roughness and low fluidity in the engine.Possible other symptoms of controllability or even no symptoms.Engine starts hard or stalls after starting.Malfunction Indicator Lamp (MIL) illuminated (also known as engine warning lamp).
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