When your Pontiac's check engine light comes on, it signals that your vehicle's onboard diagnostics system has detected a problem needing immediate attention, often related to emissions systems, engine misfires, or even a loose gas cap. Prioritized data from the engine control module--such as trouble codes and sensor readings--indicates where the issue may lie, making diagnostic scanning with an OBD-II tool essential for pinpointing the exact fault. This proactive alert not only helps prevent further engine damage by identifying issues early but also guides both you and your mechanic in taking the necessary steps to restore optimal performance, ensuring your Pontiac stays reliable and efficient on the road.
