Engine Stalls Intermittently

Check idle condition. If vehicle does not idle properly, see ROUGH OR UNSTABLE IDLE .
Ensure Engine Control Module (ECM) terminal voltages and grounds are okay.
Check for poor connections at ignition coil(s), Throttle Position (TP) sensor, Mass Airflow (MAF) sensor, Crankshaft Position (CKP) sensor, fuel injectors, fuel pump relay and ECM.
Check that MAF sensor and CKP sensor output signals are normal.
Check EGR system, check EGR valve for sticking open and EGR solenoid for proper operation.
Disconnect Oxygen sensor and check if engine condition improves.
Perform INTERMITTENT PROBLEM DIAGNOSIS under INTERMITTENTS.