Sensor/System Checks
WARNING: This page is about a different car, the 2003 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
Check the following systems for proper operation:
- Exhaust Gas Recirculation (EGR) system. See EXHAUST GAS RECIRCULATION under EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING - 4.0L AURORA article.
- Positive Crankcase Ventilation (PCV) system.
- Knock Sensor (KS) system. See KNOCK SENSOR under SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - 4.0L AURORA article.