Reduced engine power in a 2004 Pontiac Grand Prix typically indicates that the vehicle's engine control module (ECM) has detected a problem, triggering a protective mode to limit engine performance. This can be caused by various issues such as a malfunctioning throttle body, a faulty sensor (like the mass airflow sensor), or problems with the ignition or fuel system. As a result, the car may experience sluggish acceleration and reduced speed. It's advisable to diagnose the specific issue using an OBD-II scanner to retrieve any trouble codes.
Copyright © 2026 eLLeNow.com All Rights Reserved.