Check Engine Light won't stay off.

[hemihotrod402]

Alright, so the check engine light won't stay off in my 2000 CV, and it keeps throwing the same code no matter how many times I clear it. The code is:

0453 - Evaporative Emission Control System Pressure Sensor High Input.

We cleared it several times until I just gave in and replaced the sensor. But even still it keeps throwing the code, and it reappears whenever I turn off and turn on the car again after I clear it. Any ideas?

[sxcpotatoes]

clogged vacuum hose?

[miamibob]

See if this helps. As you know, you can clear the code until the cows come home - without the repair it will return.

http://www.obd-codes.com/p0443

[sly]

check the vent line to the charcoal canister. The vent valve on the top of the tank may also be clogged.

[86VickyLX]

Pressure Sensor High Circuit Input? Check the wiring. If it immediately comes on that's usually an indication of a wiring problem. EVAP related codes do not normally throw a code right away as you must meet certain criteria for the computer to run its EVAP monitor. If you can remove your gas cap without hearing hissing I doubt there's an actual pressure issue.

[hemihotrod402]

Pressure Sensor High Circuit Input? Check the wiring. If it immediately comes on that's usually an indication of a wiring problem. EVAP related codes do not normally throw a code right away as you must meet certain criteria for the computer to run its EVAP monitor. If you can remove your gas cap without hearing hissing I doubt there's an actual pressure issue.

That's what we have pretty much narrowed it down to. Is there a wiring diagram somewhere? Or should we just trace all the wires from the source and see if any of them have a break?

EDIT: I guess I need to know which of the 3 wires (what color) is the FTP signal wire.