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Q:

Reduced engine power on 2008 Chevrolet Impala SS

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
When the car is started the reduced engine power light comes on. After turning the car off and on it works
(2) Answers
The engine processor is seeing something -- sometimes -- that makes it cut the power. Have a engine diagnostic performed soon to see what is happening.