Not use to that type of scanner. A graph of the short term and long term fuel trims would be helpful. I use Torque, OBD Fusion on my android phone and tablet to monitor short and long term fuel trims to determine if I have a lean condition or a rich condition.

Multiplicative mixture adaptation: This adaptation is referred to as “long term fuel trim”. This value is measured in percentages and can occur in the positive or negative values. This adaptation occurs during part-load driving conditions.
Excessively positive multiplicative adaptation values indicate lean condition. Some common causes are:
MAF malfunction, incorrect signal information sent to the ECM
Low fuel pressure, faulty fuel pump
Unmetered air leak, such as torn intake boot, etc
Pressure regulator malfunction
Excessively negative multiplicative adaptation values indicate rich condition. Some common causes are:
Sensor failure that could result in erroneous information to falsely enrich mixture, such as engine coolant temperature sensor or intake air temperature sensor
High fuel pressure, restriction in return line or fault with fuel pressure regulator
MAF malfunction, incorrect signal information being sent to the ECM
Restriction at air intake blocking airflow into engine, such as a clogged air filter

Hint: To determine if the MAF is sending incorrect information to the ECM, check the additive and multiplicative mixture adaptations. When the mixture adaptations are contradicting each other, this indicates that the MAF is faulty and sending incorrect signal information.

Hope this help.

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