I've had this code since I got my car. 02 v6. I've already replaced the gas cap, fuel pump w/ sending unit (that includes the fuel tank pressure sensor), and fuel filter. What else can I do? Is it probably a stuck valve? Should I try cleaning something?

 

Code P0452 is an electrical problem, probably caused by an open connection at connector C405 under the car just in front of the rear axle and fuel tank. That's where the pressure gauge connects to the car. Check the dark green wire and the orange/black wire.

 

Thanks a lot for the picture. That makes things easier. I assume you mean test and see if they're working? I'll have to bring my car to a friend who has the equipment to check wires and I'll report back here when I've done that. What readings should they show?

 

also check the hose to the canister and make sure its ok. canister is behind (to the back of the car) the rear driver side wheel. also check canister and make sure its not busted.

 

Sorry for the lack of replying, I went out of town. What's the name of the canister you're referring to?

 

evap charcoal canister, sorry looks like the 02 has its evap canister on the gas tank.