Will a bad mass airflow sensor cause a 1998 Buick LeSabre Custom to run rough and stalling out?

Yes, a bad mass airflow sensor (MAF) can cause a 1998 Buick LeSabre Custom to run rough and potentially stall out. The MAF sensor measures the amount of air entering the engine, and if it's malfunctioning, it can lead to incorrect air-fuel mixture. This imbalance can result in poor engine performance, rough idling, and stalling. If you suspect the MAF sensor is faulty, it's advisable to have it tested or replaced.