One problem related to engine oil leaking has 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.
I was on highway one evening and my cruise control was engaged. My power went out completely on the car. I immediately noticed that the car shut down and I was able to coast to the side of the highway. After gathering my bearings, I was able to turn the car back on and drive off the freeway. It was determined that my oil was low (no warning light). Prior to this incident, I was going down hill on a local street when my warning system came on and indicated that I had reduced engine power and traction stability control issues. After going to the dealer, it was determined that my oil was extremely low, however no leaks or cause was ever found. Prior to this, I had to get my accelerator sensor replaced because the reduced engine power warning came on. It was not covered under warranty and I had to pay several hundred dollars to 'fix' the issue. As recently as yesterday, June 16, 2014, I turned my car on and the reduced engine power and traction control warning came on. I immediately turned the car off and checked the oil. It was low but no warning light to indicate this issue came on (same as in the past). I faithfully get my oil changed every 3,000 miles or 3 months, whichever is first. My oil life was at 54% yesterday and I did take it in for an oil change this morning. It is obvious based on others experiences, that this is a known issue amongst 2009 Impala owners. The fact that I did not receive a warning when I was on a major highway and my car shut off while still in motion, is extremely scary and it traumatized my son tremendously. I am hoping that some type of investigation will be initiated because it could result in serious injuries or even death.