One problem related to engine exhaust system has been reported for the 2008 Chevrolet Impala. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Chevrolet Impala based on all problems reported for the 2008 Impala.
I own a 2008 with less than 50,000 miles on it and the check engine light came on. I had it diagnosed and was told it is the secondary air injection system (diagnostic trouble code p2444) which caused the vehicle to fail the emissions test. The dealership refuses to repair it and states the warranty is only valid for 3 years or 30,000 miles. I cannot get the vehicle inspected until the problem is fixed and the check engine light goes off. I am very disappointed that a car only 2 years old can have such a major problem in such a short amount of time. The repairs will cost $1600 to $2000 because it is an internal problem with the engine. I tried to get the code reset only to have the check engine light come back on.