One problem related to gas recirculation valve (egr valve) has been reported for the 2006 Chevrolet Impala. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Chevrolet Impala based on all problems reported for the 2006 Impala.
Upon entering my vehicle and waiting for the engine to warm up as it was around -05 degrees f there were no issues to be had. About 15 seconds after leaving my parking spot at my place of employment and 70 feet later my engine started feeling weird, heard a chime and saw my dashboard with the wording "engine power reduced. " not knowing what it was and knowing I had no other choice continued driving home. 4 days pass no issue then yesterday when it was 27 degrees f outside again had the car warm up and about same time frame and same distance later the same series of events occured but this time the rpm was bouncing between 700 and 1100 when I was moving in idle. Pulled over and opened the hood to inspect (car was shaking a lot at this point) and the engine is shaking as much as it could while still in its restraints, upon reving the vehicle the engine leveled out but with the foot off the gas again the shaking started again. Until further notice a vehicle that I need for my commute to and from work is parked. I do not feel safe driving not knowing what can happen.