Which condition can result in a vehicle's MAF sensor providing incorrect readings?

The condition that can lead to incorrect readings from a vehicle's Mass Air Flow (MAF) sensor is oil contamination. The MAF sensor measures the amount of air entering the engine to determine the proper fuel-air mixture for optimal combustion. If the sensor gets contaminated with oil, it can interfere with its ability to accurately measure airflow. This contamination can often occur if there are issues such as an excessive amount of oil in the air intake system, commonly from a faulty crankcase ventilation system or a damaged air filter.

In contrast, while worn-out spark plugs, dirty fuel injectors, and overfilled engine oil can lead to engine performance problems or poor combustion, they do not directly affect the MAF sensor's ability to measure intake air properly. Worn-out spark plugs can result in misfires and poor engine performance but do not alter the air measurement. Dirty fuel injectors can also cause poor combustion but again do not impact airflow measurement at the MAF. Overfilled engine oil can lead to increased stress on engine components or oil foaming, yet it doesn't directly interact with the MAF sensor readings. Therefore, oil contamination stands out as a condition that specifically affects the accuracy of the MAF sensor.