Mercury Grand Marquis P0012: “A” Camshaft Position – Over-Retarded
P0012 is a common trouble code. It affects vehicles with variable valve timing (VVT). The list of VVT vehicles is growing, and the Mercury Grand Marquis can have VVT, and is known to develop this code. P0012 is generic, which means that it has the same definition for the Grand Marquis as it does on … Read more