One problem related to engine knocking noise has been reported for the 2009 Honda Accord. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Honda Accord based on all problems reported for the 2009 Accord.
I was getting ready to leave for work one morning and I noticed when I cranked the car up that it made a knocking noise for about 2 seconds and quit. I done a lot of research a found that a lot of the same cars have had the same problem. I found out that it was the vtc actuator. It only does this when it is cool. If it has been cranked up it will not do it.