Two problems related to engine funny noise have been reported for the 2009 Chevrolet Impala. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Chevrolet Impala based on all problems reported for the 2009 Impala.
While traveling home at about 55 mph car in front of me slammed on their brakes causing me to do the same - then traction control light came on - check engine light came on and reduced engine power came on in the display window - felt like all four wheel jumping up and down when trying to gain any speed weird sound coming from engine (normally quiet).
The contact owns a 2009 Chevrolet Impala. The contact stated that while attempting to start the vehicle, it made an abnormal thumping sound lasting thirty seconds. The problem recurred multiple times. The vehicle was the taken to a dealer. The technician diagnosed that the left temperature actuator assembly needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure. The approximate failure mileage was 37,006.