The tank pressure sensor is located on top of the fuel pump assembaly. Right next to where the fuel pump electrical connector plugs in. There is a three wire connector for the sensor. You have to drop the tank to get to this sensor. P0452can also be a bad gas cap--believe it or not. Try changing the cap first.
The pressure regulator is located under the UPPER intake manifold and connects to the fuel bowl (where all of the injectors are). You must remove the plastic intake cover to access it.
Wednesday, March 12th, 2008 AT 4:48 PM