EPC stands for Electronic Power Control. there are many things that can set this off like a bad wire connection or a bad sensor. A dealer needs to help you diagnosis this problem properly.
I am assuming you need to know what a dashboard symbol means. What does the symbol look like?
your car is due for a service
If this is on your car it means your battery needs to be changed. HotKookies
It means that the Radio is turned OFF
A small yellow symbol lit up on my dashboard, is it the transmission light?
It means you need to check your engine
When the exclamation symbol comes on on your dashboard it means there is something in your engine that is not functioning properly. Unfortunately, to find out what the malfunction is, you have to take your vehicle to a mechanic. They have diagnostic tools to find out what the problem is.
Try this webpage. http://dashboardsymbols.com/the-symbols/
EPC means "Electro Plated Copper" 551 is the parts per thousands of pure silver.
Probably means to get rid of the Mercury and buy a Pontiac.
Thunderbolt symbol
Warning light symbols on the dashboard of a vehicle warn of problems to the driver. For example, the warning light symbol of an exclamation on a Lexus 350 dashboard means the tire pressure is low.